4317316 kac-25 kitchenaid built-in microwave oven combination

TECHNICAL EDUCATION

JOB AID 4317316

KAC-25

BUILT-IN MICROWAVE / OVEN

COMBINATION

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WHIRLPOOL CORPORATION assumes no responsibility for any repairs madeon our products by anyone other than Authorized Service Technicians.

Copyright 2001, Whirlpool Corporation, Benton Harbor, MI 49022

FORWARDThis Job Aid, KitchenAid Built-In Microwave/Oven Combination, (Part No. 4317316), providesthe technician with information on servicing the KitchenAid Built-In Microwave/Oven Combina-tion. It is to be used as a training Job Aid and Service Manual. For specific information on themodel being serviced, refer to the Use and Care Guide, or Tech Sheet provided with theMicrowave/Oven Combination.The Wiring Diagrams and Strip Circuits used in this Job Aid are typical and should be used fortraining purposes only. Always use the Wiring Diagram supplied with the product when servicingthe unit.

GOALS AND OBJECTIVESThe goal of this Job Aid is to provide detailed information that will enable the service technician toproperly diagnose malfunctions and repair the Built-In Microwave/Oven Combination.The objectives of this Job Aid are to:

Understand and follow proper safety precautions.

Successfully troubleshoot and diagnose malfunctions.

Successfully perform necessary repairs.

Successfully return the Microwave/Oven Combination to its proper operational status.

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TABLE OF CONTENTS

GENERAL ............................................................................................................................... 1-1Important Safety Information ............................................................................................... 1-1Warning To Service Technicians ......................................................................................... 1-3Precautions To Be Observed Before And During Servicing To Avoid Possible Exposure To Excessive Microwave Energy........................................ 1-4R.F. Leakage Test ............................................................................................................... 1-5KitchenAid Model & Serial Number Designations ............................................................... 1-6Model & Serial Number Label & Tech Sheet Locations ...................................................... 1-7Specifications ...................................................................................................................... 1-8KitchenAid Built-In Microwave Warranty ........................................................................... 1-12

COMPONENT ACCESS ......................................................................................................... 2-1

Oven Cabinet Components .................................................................................................. 2-1

Removing The Oven Control & Display Boards And The Touch Panel Assembly ................................................................................. 2-2Removing The Low Voltage Transformer, The Light Power Supplies, The Line Fuse & Fuseholder, & Suppressor Board..................................... 2-4Removing The Upper Blower Motor Assembly .............................................................. 2-6

Microwave Oven Components ............................................................................................ 2-8

Removing The Microwave Oven Assembly ................................................................... 2-8Removing The Primary & Secondary Interlock And Monitor Switches, And The Air Pressure Relief Valve............................................................................ 2-10Removing The Grill Thermal Fuse And The Grill Element Assembly .......................... 2-12Removing The Convection Temperature Sensor, The Halogen Lamp, And The Cavity Thermal Fuse .................................................................................. 2-14Removing The Convection Thermal Fuse, Convection Element, And Convection Fan Motor ....................................................................................... 2-16Removing The Cooling Fan Motor & Air Vent Solenoid ............................................... 2-18Removing The Magnetron Thermal Fuse And The Magnetron.................................... 2-20Removing The High Voltage Transformer .................................................................... 2-22Removing The Line Fuse & Fuseholder, The High Voltage Rectifier, & High Voltage Capacitor .......................................................................................... 2-24Removing The Turntable Motor ................................................................................... 2-26Removing The Oven Door Handle & Front Door Glass ............................................... 2-27Removing The Oven Door & The Inner Glass ............................................................. 2-28

Lower Oven Components .................................................................................................. 2-30

Removing The Lower Oven Door Latch Assembly ...................................................... 2-31Removing The Broil Element ....................................................................................... 2-32Removing The Oven Temperature Sensor .................................................................. 2-33

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Removing A Halogen Lamp Assembly......................................................................... 2-34Removing The Meat Probe Jack .................................................................................. 2-35Removing The Rear Panels ......................................................................................... 2-36Removing The Convection Bake Element & Fan Motor Assembly .............................. 2-37Removing The Lower Blower Motor Assembly ............................................................ 2-39Removing The Oven Shutdown Thermal Fuse & Hidden Bake Element ..................... 2-40Removing The Oven Door ........................................................................................... 2-42Removing The Oven Door Glass, Hinges, & Handle ................................................... 2-43Removing The Oven Door Gasket ............................................................................... 2-45

COMPONENT TESTING ........................................................................................................ 3-1The General Oven Components.......................................................................................... 3-1

Low Voltage Transformer ............................................................................................... 3-1Main Line Fuse............................................................................................................... 3-2Light Power Supplies ..................................................................................................... 3-2

The Microwave Oven Components ..................................................................................... 3-3Turntable Motor .............................................................................................................. 3-3Cooling Fan Motor .......................................................................................................... 3-3Upper Blower Motor ....................................................................................................... 3-4Convection Fan Motor .................................................................................................... 3-4Convection Temperature Sensor ................................................................................... 3-5Cavity, Grill, Convection, & Magnetron Thermal Fuses ................................................. 3-6Convection Element ....................................................................................................... 3-7Grill Element Assembly .................................................................................................. 3-7Line Fuse, High Voltage Rectifier, & High Voltage Capacitor ........................................ 3-8Air Vent Solenoid ........................................................................................................... 3-9Interlock Switches .......................................................................................................... 3-9High Voltage Transformer ............................................................................................ 3-10Magnetron .................................................................................................................... 3-10

The Lower Oven Components........................................................................................... 3-11Oven Door Latch Assembly ......................................................................................... 3-11Lower Blower Motor ..................................................................................................... 3-12Oven Temperature Sensor ........................................................................................... 3-12Convection Bake Element ............................................................................................ 3-13Convection Fan Motor .................................................................................................. 3-13Broil Element ................................................................................................................ 3-14Hidden Bake Element .................................................................................................. 3-14Oven Shutdown Thermal Fuse .................................................................................... 3-15

DIAGNOSIS & TROUBLESHOOTING ................................................................................... 4-1Failure/Error Display Codes ................................................................................................ 4-1Microwave Oven Relay Logic .............................................................................................. 4-2Lower Oven Relay Logic ..................................................................................................... 4-2Microwave Oven Power Output Test ................................................................................... 4-2

WIRING DIAGRAMS & STRIP CIRCUITS ............................................................................. 5-1

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ELECTRICAL SHOCK HAZARD

Disconnect power before servicing.

Replace all panels before operating.

Failure to do so could result in death orelectrical shock.

Important safety messages have been pro-vided in this Job Aid. Always read and obey allsafety messages.

GENERALIMPORTANT SAFETY INFORMATION

Your safety and the safety of others is very important.

This is the safety alert symbol.

This symbol alerts you to haz-ards that can kill or hurt youand others.

All safety messages will be preceded by thesafety alert symbol and the word WARNING.

All safety messages will identify the hazard, tellyou how to reduce the chance of injury, and tellyou what can happen if the instructions are notfollowed.

WARNING

IMPORTANT SAFETYINSTRUCTIONS

Before touching any oven component or wir-ing, always unplug the oven from its powersource and discharge the capacitor by using a20,000 ohm discharge resistor or use an insu-lated plastic handle screwdriver to short acrossthe capacitor terminals.

Check that the unit is grounded before trouble-shooting. Be careful of the high voltage circuits.Discharge any static charge from your body bytouching ground before handling any part ofthe circuitry on the control board. Electrostaticdischarge may damage the control circuit.

Do not touch oven components or wiring duringoperation. Attach meter leads with alligatorclips when making operational tests.

For continued protection against radiationemission, replace only with these types ofswitches: Primary (Interlock) Switch: SZM-V16-FA-63 or VP-533A-OF; Secondary (Interlock)Switch: SZM-V01-FA-32; Interlock (Monitor)Switch: SZM-VI6-FA-62 or VP-532A-OF; OvenLamp Switch: SZM-V6-FA-31 or VP-331 A-OD.

It is neither necessary nor advisable to attemptmeasurement of high voltage.

Attaching the adaptor ground terminal to thewall receptacle cover screw does not groundthe appliance unless the cover screw is metaland not insulated and the wall receptacle isgrounded through the house wiring.

ELECTROSTATIC DISCHARGE(ESD) SENSITIVE ELECTRONICS

ESD problems are present everywhere. ESDmay damage or weaken the electronic con-trol assembly. The new control assemblymay appear to work well after repair is fin-ished, but failure may occur at a later datedue to ESD stress.

Use an antistatic wrist strap. Connectthe wrist strap to a green ground con-nection point or unpainted metal in theappliance; or touch your finger repeat-edly to a green ground connection pointor unpainted metal in the appliance.

Before removing the part from its pack-age, touch the antistatic bag to a greenground connection point or unpaintedmetal in the appliance.

Avoid touching electronic parts or ter-minal contacts. Handle the electroniccontrol assembly by the edges only.

When repackaging the failed electroniccontrol assembly in an antistatic bag,observe the above instructions.

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GROUNDING INSTRUCTIONS

CORD CONNECTED

The microwave oven must be grounded. In theevent of an electrical short circuit, groundingreduces the risk of electric shock by providingan escape wire for the electrical current. Themicrowave oven is equipped with a cord havinga grounding wire with a grounding plug. Theplug must be plugged into an outlet that isproperly installed and grounded.

WARNINGELECTRICAL SHOCK HAZARD

Improper use of the grounding plug canresult in a risk of electric shock.

Consult a qualified electrician or serviceman ifthe grounding instructions are not completelyunderstood, or if doubt exists as to whether themicrowave oven is properly grounded. Do notuse an extension cord. If the power supply cordis too short, have a qualified electrician orserviceman install an outlet near the micro-wave oven.

PERMANENTLY CONNECTED

The microwave oven must be connected to agrounded, metallic, permanent wiring system,or an equipment grounding conductor shouldbe run with the circuit conductors and con-nected to the equipment grounding terminal, orlead, on the microwave oven.

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To avoid possible exposure to microwave ra-diation or energy, visually check the oven fordamage to the door and door seal beforeoperating any oven. Use a microwave surveymeter to check the amount of leakage beforeservicing. In the event the R.F. Ieakage ex-ceeds 4 mw/cm2 at 5 cm, appropriate repairmust be made before continuing to service theunit. Check interlock function by operating thedoor latch. The oven cook cycle should cut offbefore the door can be opened.

The door and latching assembly contains theradio frequency energy within the oven. Thedoor is protected by three safety interlockswitches. Do not attempt to defeat them.

Under no circumstances should you try tooperate the oven with the door open.

Proper operation of microwave ovens re-quires that the magnetron be properlyassembled to the waveguide and cavity.Never operate the magnetron unless it isproperly installed.

Be sure the RF seal is not damaged andis assembled around the magnetron domeproperly when installing the magnetron.

Routine service safety procedures shouldbe exercised at all times.

Untrained personnel should not attemptservice without a thorough review of testprocedures and safety information con-tained in this Job Aid.

WARNING TO SERVICE TECHNICIANS

KitchenAid microwave ovens have a monitor-ing system designed to assure proper opera-tion of the safety interlock systems.

The interlock monitor switch will immediatelycause the oven fuse to blow if the door isopened and the primary door interlock switchand/or the secondary interlock switch contactsfail in a closed position.

CAUTION: Replace a blown fuse with a 20ampere class H fuse only.

Test the upper and lower door interlockswitches, cook relay and interlock monitorswitch (middle switch) for proper operation asdescribed in the component test procedures,before replacing the blown oven fuse.

Do not attempt to repair sticking contactsof any interlock switch, safety switch, orCook (Latch) relay. The components mustbe replaced.

Any indication of sticking contacts during com-ponent tests requires replacement of that com-ponent to assure reliability of the safety inter-lock system.If the fuse is blown, the Monitor, Primary,and Secondary interlock switches must bereplaced. Be sure they are properly con-nected.

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PRECAUTIONS TO BE OBSERVED BEFORE AND DURINGSERVICING TO AVOID POSSIBLE EXPOSURE

TO EXCESSIVE MICROWAVE ENERGY

A. Do not operate or allow the oven to beoperated with the door open.

B. Make the following safety checks on allovens to be serviced before activating themagnetron or other microwave source,and make repairs as necessary:

1) Interlock Operation

2)Proper Door Closing

3)Seal and Sealing Surfaces (Arcing,Wear, and Other Damage)

4)Damage to or Loosening of Hinges andLatches

5) Evidence of Dropping or Abuse

C. Before turning on the microwave powerfor any service test or inspection within themicrowave generating components, check

the magnetron, wave guide or transmis-sion line, and cavity for proper alignment,integrity, and connections.

D. Any defective or misadjusted componentsin the interlock, monitor, door seal, andmicrowave generation and transmissionsystems shall be repaired, replaced, oradjusted, using procedures described inthis Job Aid, before the oven is released tothe owner.

E. A microwave leakage check to verify com-pliance with Federal Performance Stan-dard should be performed on each ovenprior to release to the owner.

F. Do not attempt to operate the oven if thedoor glass is broken.

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R.F. LEAKAGE TEST

EQUIPMENT

Electromagnetic energy leakage monitor(NARDA 8100B, HOLADAY H 1501 ).

275 15 ML glass beaker.

TEST

On every service call, checks for microwaveenergy emission must be made according tothe following manner.

1. Remove the cooking rack from the ovencavity, if the microwave oven is soequipped.

2. Place a 275 15 ML (9.3 oz.) glass ofwater in the center of the oven bottom.

3. Select "HIGH" cook power, turn the micro-wave oven on, and test for R.F. Ieakage atthe following locations:

a)Around the cabinet at the front.b)Around the door.c) Across the console panel.d)Horizontally across the door.e)Vertically across the door.f) Diagonally across the door.g)Across the air vents.h)Across the rear air vent.i) All lockseams.j) Weld at bottom.k) Bottom plate.I) Oven feet.

4. The scan speed is one inch per second.

When checking for R.F. Ieakage, use an ap-proved R.F. measuring device to assure lessthan 4 mw/cm2 emission at 5 cm distance witha maximum scan rate of 2.54 cm/second, incompliance with U.S. Government Departmentof Health, Education and Welfare 21CFR1030,Performance Standard for Microwave Ovens.

A properly operating door and seal assemblywill normally register small emissions, but theymust be no greater than 4 mw/cm2 to allow formeasurement uncertainty.

NOTE: Enter leakage readings in space BE-FORE and AFTER on the service document.

All microwave ovens exceeding the emissionlevel of 4 mw/cm2 must be reported to Dept. ofService for Microwave Ovens immediately andthe owner should be told not to use the micro-wave oven until it has been repaired com-pletely.

If a microwave oven is found to operate with thedoor open, report to Dept. of Service, themanufacturer and CDRH* immediately. Alsotell the owner not to use the oven.

The interlock monitor switch acts as the finalsafety switch protecting the customer frommicrowave radiation. If the interlock monitorswitch operated to blow the fuse when theinterlocks failed, you must replace all interlockswitches with new ones, because the contactsof those interlock switches may be melted andwelded together.

If safety interlock/monitor switch replacement,or adjustment, is required, you must reconnectthe circuit, and perform a continuity check onthe monitor circuit.

All repairs must be performed in such a mannerthat microwave energy emissions are minimal.

Address for CDRH is:

Office of Compliance (HFZ-342) Center forDevices and Radiological Health2098 Gaither RoadRockville, MD 20850

* CDRH: Center for Devices and Radiological Health,Food and Drug Administration.

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KITCHENAID MODEL & SERIAL NUMBER DESIGNATIONS

MODEL NUMBER

SERIAL NUMBER

SERIAL NUMBER X K 1 6 0 1 0 0 4MANUFACTURING SITE X = OXFORDYEAR OF PRODUCTION K = 2000, L = 2001, M = 2002WEEK OF PRODUCTION 16TH WEEKPRODUCT SEQUENCE NUMBER

MODEL NUMBER K EH C 3 0 9 J S S 0INTERNATIONAL SALES IND.OR MARKETING CHANNELIF PRESENT

PRODUCT GROUP K = KITCHENAID BRAND

PRODUCT IDENTIFICATION EB = ELECTRIC BUILT-IN OVEN EH = ELECTRIC BUILT-IN HI SPEED COMBO EM = ELECTRIC BUILT-IN MICRO COMBO EW = ELECTRIC WARMING OVEN GB = GAS BUILT-IN OVEN GM = GAS BUILT-IN MICRO COMBO OVEN

MERCHANDISING SCHEME C = FLUSH LOOK D = DRAWER I = IMPERIAL N = INTERNATIONAL COLLECTION EUROPEAN S = SUPERBA

CAPACITY / SIZE / SERIES / CONFIGURATION 1ST POSITION 2ND POSITION 1 = SINGLE OVEN 4 = 24 WIDE 2 = DOUBLE OVEN 6 = 36 WIDE 3 = COMBO OVEN 7 = 27 WIDE 4 = OVEN W/DRAWER 0 = 30 WIDE 5 = MINI OVEN 6 = COMBO W/MINI OVEN

FEATURES 0 = STANDARD FEATURES 1 = STANDARD FEATURES / ELECTRIC CLOCK 5 = DELUXE FEATURES 6 = DELUXE FEATURES / ELECTRIC CLOCK 7 = DELUXE FEATURES / THERMAL CONVECTION 8 = DOUBLE THERMAL CONVECTION 9 = MULTI-MODE

YEAR OF INTRODUCTION D = 1995, G = 1998, H = 1999, J = 2000

COLOR CODE AL = ALMOND, BL = BLACK, BS = BLACK ON STAINLESS, BT = BISCUIT, SS = BRUSHED STAINLESS STEEL, WH = WHITE

ENGINEERING CHANGE (0, 1, 2, ETC.)

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MODEL & SERIAL NUMBER LABELAND TECH SHEET LOCATIONS

The Model/Serial Number label and Tech Sheet locations are shown below.

Tech Sheet Location(Below Top Front Cover)

Model & Serial Number Location

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SPECIFICATIONS

Model Number KEMS377D KEMS307D KEMS378G KEMS308GColors Available BS, BS SS SS Model Description MW/BI Combo MW/BI Combo MW/BI Combo MW/BI Combo Size-Configuration 27" 30" 27" 30"Dimensions/Specifications Overall Height (in) 42 3/8" 42 3/8" 42 3/8" 42 3/8" Overall Width (in) 26 3/4" 29 3/4" 26 3/4" 29 3/4" Overall Depth Inc Hrdwr/Hndl (in) 25 1/8" 25 1/8" 25 1/8" 25 1/8" Depth W/O Handle (in) 23 7/8" 23 7/8" 23 7/8" 23 7/8" Cutout Dimensions Cutout Height (in) (Measure Or Min/Max) 41 1/4" 41 1/4" 41 1/4" 41 1/4" Cutout Width (in) (Measure Or Min/Max) 25 1/2" 28 1/2" 25 1/2" 28 1/2" Cutout Depth (in) (Measure Or Min/Max) 23 1/4" 23 1/4" 23 1/4" 23 1/4" Other Dimensions Conduit Size (in) (Length/Diameter) 57"; 1/2" 57"; 1/2" 57"; 1/2" 57"; 1/2" Net Weight (lbs) 210 216 210 216 Shipping Weight (lbs) 221 227 221 227 Total Connected Load in kW 240 Volts 8.5 kw 8.5 kw E 8.5 kw 208 Volts 7.4 kw 7.4 kw E 7.4 kw Circuit Amps 40 AMP 40 AMP 40 AMP 40 AMPExterior Oven Front Frame Porcelain Porcelain Porcelain Porcelain Oven Control Type Electronic Electronic Electronic Electronic Membrane Touch Yes Yes Yes Yes Microwave Timer Yes Yes Yes Yes Child Lock Out Yes Yes Yes Yes Temperature Probe Yes Yes Yes Yes Microwave Oven Features Diagnostics Yes Yes Yes Yes Error Indication Yes Yes Yes Yes MW Power (Watts) 900 Watts 900 Watts 900 Watts 900 Watts Stoppable Turntable No No No No Broil Element Output (Watts) 1200 Watts 1200 Watts 1200 Watts 1200 Watts Broil Heat-Up Time

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Model Number KEMC378H KEMC308H KEMS378G KEMS377GColors Available BL,WH, BT, BL, BT, WH BL, WH AL, BL, BS, BT, WH Model Description MW/BI Combo MW/BI Combo MW/BI Combo MW/BI Combo Size-Configuration 27" 30" 27" 27"Dimensions/Specifications Overall Height (in) 42 3/8" 42 3/8" 42 3/8" 42 3/8" Overall Width (in) 26 3/4" 29 3/4" 26 3/4" 26 3/4" Overall Depth Inc Hrdwr/Hndl (in) 25 1/8" 25 1/8" 25 1/8" 25 1/8" Depth W/O Handle (in) 23 7/8" 23 7/8" 23 7/8" 23 7/8" Cutout Dimensions Cutout Height (in) (Measure Or Min/Max) 41 1/4" 41 1/4" 41 1/4" 41 1/4" Cutout Width (in) (Measure Or Min/Max) 25 1/2" 28 1/2" 25 1/2" 25 1/2" Cutout Depth (in) (Measure Or Min/Max) 23 1/4" 23 1/4" 23 1/4" 23 1/4" Other Dimensions Conduit Size (in) (Length/Diameter) 57"; 1/2" 57"; 1/2" 57"; 1/2" 57"; 1/2" Net Weight (lbs) 210 216 210 210 Shipping Weight (lbs) 221 227 221 221 Total Connected Load in kW 240 Volts 8.5 kw 8.5 kw E E 208 Volts 7.4 kw 7.4 kw E E Circuit Amps 40 AMP 40 AMP 40 AMP 40 AMPExterior Oven Front Frame Porcelain Porcelain Porcelain Porcelain Oven Control Type Electronic Electronic Electronic Electronic Membrane Touch Yes Yes Yes Yes Microwave Timer Yes Yes Yes Yes Child Lock Out Yes Yes Yes Yes Temperature Probe Yes Yes Yes Yes Microwave Oven Features Diagnostics Yes Yes Yes Yes Error Indication Yes Yes Yes Yes MW Power (Watts) 900 Watts 900 Watts 900 Watts 900 Watts Stoppable Turntable No No No No Broil Element Output (Watts) 1200 Watts 1200 Watts 1200 Watts 1200 Watts Broil Heat-Up Time

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Model Number KEMI371G KEMI301G KEMS307GColors Available BL, WH BL, WH AL, BL, BS, BT, WH Model Description MW/BI Combo MW/BI Combo MW/BI Combo Size-Configuration 27" 30" 30"Dimensions/Specifications Overall Height (in) 42 3/8" 42 3/8" 42 3/8" Overall Width (in) 26 3/4" 29 3/4" 29 3/4" Overall Depth Inc Hrdwr/Hndl (in) 25 1/8" 25 1/8" 25 1/8" Depth W/O Handle (in) 23 7/8" 23 7/8" 23 7/8" Cutout Dimensions Cutout Height (in) (Measure Or Min/Max) 41 1/4" 41 1/4" 41 1/4" Cutout Width (in) (Measure Or Min/Max) 25 1/2" 28 1/2" 28 1/2" Cutout Depth (in) (Measure Or Min/Max) 23 1/4" 23 1/4" 23 1/4" Other Dimensions Conduit Size (in) (Length/Diameter) 57"; 1/2" 57"; 1/2" 57"; 1/2" Net Weight (lbs) 210 210 210 Shipping Weight (lbs) 221 221 221 Total Connected Load in kW 240 Volts E E E 208 Volts E E E Circuit Amps 40 AMP 40 AMP 40 AMPExterior Oven Front Frame Porcelain Porcelain Porcelain Oven Control Type Electronic Electronic Electronic Membrane Touch Yes Yes Yes Microwave Timer Yes Yes Yes Child Lock Out Yes Yes Yes Temperature Probe Microwave Oven Features Diagnostics Yes Yes Yes Error Indication Yes Yes Yes MW Power (Watts) 900 Watts 900 Watts 900 Watts Stoppable Turntable No No No Broil Element Output (Watts) Broil Heat-Up Time

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Model Number KEMS308G KEHC379J KEHC309JColors Available BL, WH BL, BT, SS, WH BL, BT, SS, WH Model Description MW/BI Combo MW/BI Combo MW/BI Combo Size-Configuration 30" 27" 30"Dimensions/Specifications Overall Height (in) 42 3/8" 42 3/8" 42 3/8" Overall Width (in) 29 3/4" 26 3/4" 29 3/4" Overall Depth Inc Hrdwr/Hndl (in) 25 1/8" 25 1/8" 25 1/8" Depth W/O Handle (in) 23 7/8" 23 7/8" 23 7/8" Cutout Dimensions Cutout Height (in) (Measure Or Min/Max) 41 1/4" 41 1/4" 41 1/4" Cutout Width (in) (Measure Or Min/Max) 28 1/2" 25 1/2" 28 1/2" Cutout Depth (in) (Measure Or Min/Max) 23 1/4" 23 1/4" 23 1/4" Other Dimensions Conduit Size (in) (Length/Diameter) 57"; 1/2" 57"; 1/2" 57"; 1/2" Net Weight (lbs) 210 210 216 Shipping Weight (lbs) 221 221 227 Total Connected Load in kW 240 Volts E 9.1 kw 9.1 kw 208 Volts E 7.9 kw 7.9 kw Circuit Amps 40 AMP 50 AMP 50 AMPExterior Oven Front Frame Porcelain Porcelain Porcelain Oven Control Type Electronic Electronic Electronic Membrane Touch Yes Yes Yes Microwave Timer Yes Yes Yes Child Lock Out Yes Yes Yes Temperature Probe Yes Yes Microwave Oven Features Diagnostics Yes Yes Yes Error Indication Yes Yes Yes MW Power (Watts) 900 Watts 900 Watts 900 Watts Stoppable Turntable No No No Broil Element Output (Watts) 1200 Watts 1200 Watts Broil Heat-Up Time

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KITCHENAID BUILT-IN MICROWAVE WARRANTY

SECOND-THROUGH FIFTH-YEAR LIMITEDWARRANTYFrom Date ofPurchase.

ONE-YEAR FULLWARRANTYFrom Date ofPurchase.

LENGTH OFWARRANTY:

KITCHENAIDWILL PAY FOR:

KITCHENAIDWILL NOT PAY FOR:

KITCHENAID AND KITCHENAID CANADA DO NOT ASSUME ANY RESPONSIBILITY FOR INCIDENTAL ORCONSEQUENTIAL DAMAGES. Some states or provinces do not allow the exclusion or limitation of incidental orconsequential damages, so this exclusion or limitation may not apply to you. This warranty gives specific legalrights and you may also have other rights which vary from state to state or province to province.

Outside the United States and Canada, a different warranty may apply. For details, please contact yourauthorized KitchenAid dealer.

If you need assistance or service, first see the Diagnosis & Troubleshooting section of this book. After checkingDiagnosis & Troubleshooting, additional help can be found by checking the Requesting Assistance or Servicesection in the Use And Care Guide. In the U.S.A., call our Consumer Assistance Center at: 1-800-422-1230. InCanada, call KitchenAid Canada at: 1-800-461-5681 or 1-800-807-6777.

Replacement partsand repair laborcosts to correctdefects in materi-als or workman-ship. Service mustbe provided by aKitchenAid desig-nated servicingcompany.

Replacement partsfor the stainlesssteel oven cavity/inner door if thepart rusts throughdue to defects inmaterials or work-manship.

Replacement partsfor microwavemagnetron or anyoven electricelement to correctdefects in materi-als or workman-ship. Replacementparts for solid statetouch controlsystem to correctdefects in materi-als or workman-ship.

A. Service calls to:

1. Correct the installation of the microwaveoven.

2. Instruct you how to use the microwaveoven.

3. Replace house fuses or correct housewiring.

B. Repairs when oven is used in other thannormal single-family household use.

C. Damage resulting from accident, alteration,misuse, abuse, fire, flood, acts of God, im-proper installation, installation not in accor-dance with local electrical codes, or use ofproducts not approved by KitchenAid.

D. Any labor costs during the limited warranties.

E. Replacement parts or repair labor costs forunits operated outside the United States orCanada.

F. Pickup and delivery. This product is de-signed to be repaired in the home.

G. Repairs to parts or systems resulting fromunauthorized modifications made to theappliance.

H. In Canada, travel or transportation expensesfor customers who reside in remote areas.

SECOND-THROUGHTENTH-YEARLIMITEDWARRANTYFrom Date ofPurchase.

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COMPONENT ACCESSThis section instructs you on how to service each component inside the Built-In Microwave/ OvenCombination. The Component Access is divided into three sections:

Oven Cabinet Components (page 2-1) Microwave Oven Components (page 2-8) Lower Oven Components (page 2-30)

Refer to the appropriate section for the component you are servicing.

OVEN CABINET COMPONENTS

Oven Control &Display Boards

Lower Oven LightPower Supply

Low VoltageTransformer

Suppressor Board

Microwave LightPower Supply

Line Fuse

Upper Blower MotorAssembly

2-2

REMOVING THE OVEN CONTROL & DISPLAY BOARDSAND THE TOUCH PANEL ASSEMBLY

1. Disconnect the electrical power to themicrowave/oven combination.

2. Open the lower oven door.

3. Remove the bottom screw from each ofthe two side trim pieces (see below).

4. To remove the side trim, pull the bottomout approximately 2, and slide the topdown to free it from the control panel.

CAUTION: When you work on the microwave/oven combination, be careful when handlingthe sheet metal parts. Sharp edges may bepresent, and you can cut yourself if you are notcareful.

6. To remove the oven control panel, pull itout at the bottom, and lift and unhook itfrom the oven cabinet support at the top.

7. Pull the ground clip on the end of the greenwire from the edge of the metal panel, anddisconnect the wire connectors from theboard. Set the panel face down on a pad-ded surface to protect the finish.





WARNING

Ground Clip

Wire Connectors

5. Remove the screws from the oven controlpanel.

Control Panel Screw

Pull Out

OvenControlPanel

Lift OffTopSupport

Side Trim Screw (1 On Each Side)

Pull Out BottomOf Side Trim

Pull Side TrimDown & AwayFrom ControlPanel

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8. To remove the oven control & displayboards:

a) Remove the seven mounting screws.

b) Lift the ends of the locking arm anddisconnect the ribbon cable from itsconnector.

NOTE: The control and display boards aredesigned to be replaced as an assembly.

9. To remove the touch panel assembly:

a) Remove the standoffs and spacers fromover the mounting studs.

Screws

Screws

Lift Ends OfLocking Arm

b) Remove the six mounting screws.

c) Lift the touch panel assembly off thefront of the oven cabinet.

REASSEMBLY NOTE: When you reinstall theoven control panel, use the following proce-dure (refer to the photos on the previous page,as necessary):

1. Reconnect the wiring to the control boardterminals.

2. Clip the ground wire to the metal edge ofthe control panel.

3. Hook the ends of the control panel overthe rubber tips of the brackets.

4. Push the bottom of the control panel in andposition the plastic air duct under the lip ofthe panel.

5. Align the mounting holes and install thetwo side screws in the control panel.

Air Duct Bottom Lip Of Control Panel

Standoffs & Spacers

Mounting Screws

Touch PanelAssembly

IMPORTANT NOTE: A cavity size connector(see the photo below) is provided on connectorP5. The connector is on the end of the yellowwire coming from pin 10. This cavity size con-nector determines the various cycling of thecooking relays in the 27 and 30 ovens. Besure to observe the proper cavity size configu-ration for the oven you are servicing.

30 ovens = Yellow to tan wires

27 ovens = Yellow not connected

Tan Wire

Yellow Wire

P5

Cavity Size Connector

2-4

REMOVING THE LOW VOLTAGE TRANSFORMER,THE LIGHT POWER SUPPLIES,

THE LINE FUSE & FUSEHOLDER, & SUPPRESSOR BOARD


2. Remove the control panel (see page 2-2steps 1 through 7 for the procedure) andposition it out of the way.

The components described on these pagesare shown below (shown with the top coversremoved).


3. To remove the low voltage transformer:

a) Disconnect the 10-hole connector fromthe control board at P17.

b) Remove the mounting screw at the topand unhook the bottom transformer tabfrom the oven cabinet slot.

4. To remove a light power supply:

a) Disconnect the four wires from the LINEand LOAD terminals. Note that the LINEterminals are smaller than the LOADterminals to prevent miswiring.

b) Remove the mounting screw and un-hook the tab from the oven cabinet slot.





WARNING

Screw LV Transformer Connector P17

Lower OvenLight

Power Supply

Screw

Screw

Microwave OvenLight

Power Supply

SuppressorBoard

Line Fuse

LightPower Supplies

L.V. Transformer

2-5

6. To remove the suppressor board:

a) Remove the hex nuts from the blackand white wires and remove the wiresfrom the screw terminals.

b) Remove the mounting screw holdingthe suppressor board to the terminalstrip.

White Wires Black Wires

Suppressor Board

Screw

5. To remove the line fuse & fuseholder:

a) Unsnap the line fuse from the fuseholderclips and remove it.

b) Disconnect the wires from the termi-nals.

b) Remove the mounting screws and un-hook the tab from the oven cabinet slot.

Line Fuse

Screw (1 of 2)Fuseholder

Wire Wire

2-6

REMOVING THE UPPER BLOWER MOTOR ASSEMBLY


2. Open the lower oven door.

3. Remove the bottom screw from each ofthe two side trim pieces (see below).

4. To remove the side trim, pull the bottomout approximately 2, and slide the topdown to free it from the control panel.






WARNING

Side Trim Screw (1 On Each Side)

Pull Out BottomOf Side Trim

Pull Side TrimDown & AwayFrom ControlPanel

5. Remove the four cabinet mounting screws(2 on each side), and pull the oven out ofits mounting location so that you can ac-cess the back.

Cabinet Mounting Screw (2 On Each Side)

ConduitClamp

Top Rear Cover (6 Screws)

6. Remove the screw from the power conduitclamp and remove the clamp.

7. Remove the 6 screws from the top rearoven cabinet cover.

2-7

9. Remove the four screws from the blowercover and remove the cover.

11. Remove the two screws from the blowermounting bracket and remove the bracketand blower.

12. Remove the four mounting screws fromthe blower motor assembly and remove itfrom the bracket.

10. Disconnect the two wires from the blowermotor terminals.

4 Blower Motor Assembly Screws

Blower Motor Assembly

2 Wires

Screw(1 of 2)

Blower Motor

Blower Mounting Bracket

Screw Air Vent Cover Screw

2 Screws Blower Cover 2 Screws

8. Remove the two top screws from the rearcover and remove the air vent cover.

2-8

MICROWAVE OVEN COMPONENTS

Grill ElementAssembly

CavityThermal Fuse

GrillThermal Fuse

Cooling FanMotor

TurntableMotor

Air PressureRelief Valve &SecondaryInterlock Switch

Air VentSolenoid

ConvectionTemperatureSensor

Primary Interlock Switch

High Voltage Rectifier

High VoltageTransformer

Line Fuse

High VoltageCapacitor

Magnetron

Mag. Thermal Fuse

Convection Element

Convection Fan Motor

ConvectionThermal Fuse

Monitor Switch

Halogen Lamp





REMOVING THE MICROWAVE OVEN ASSEMBLY



WARNINGTurntable &

Roller Assembly

2. Open the microwave oven door and re-move the glass turntable and roller as-sembly from inside the oven cavity. Leavethe oven door open.

3. Remove the control panel (see page 2-2steps 1 through 7 for the procedure) andposition it out of the way.

2-9

4. Remove the three screws from the upperair vent and remove the air vent.

6. Remove the two screws from the lowermicrowave mounting brackets.

3 Air Vent Screws

Lower Microwave Bracket Screws

Microwave LightPower Supply

6-Pin Connector

Ground Wire

7. Close the microwave oven door.

8. Pull the microwave oven out of the ovencabinet approximately four inches.

EXCESSIVE WEIGHT HAZARD

Use two or more people to remove andreinstall the microwave oven.

Failure to follow this instruction can result inback, or other injury.

WARNING

5. Remove the four screws from the lower airvent and remove the air vent.

Lower Air Vent

Upper Air Vent

4 Air Vent Screws

9. Disconnect the two red LOAD wires fromthe microwave light power supply, the 6-pin connector, and the green ground wirein the top of the oven cabinet.

10. Slide the plastic grommet and the micro-wave oven out of the oven cabinet and setthe oven on your work surface.

Plastic Grommet

Lower Microwave Bracket Screws

2-10

REMOVING THE PRIMARY & SECONDARYINTERLOCK AND MONITOR SWITCHES,AND THE AIR PRESSURE RELIEF VALVE


2. To remove the secondary interlockswitch:

a) Remove the microwave oven from theoven cabinet (see pages 2-8 & 2-9 forthe procedure).

b) Remove the six screws from the leftside panel and remove the panel.


c) Remove the wires from the switch ter-minals.

Left Side Panel

Screw (1 of 6)

d) Unclip the switch from the air pressurerelief valve. NOTE: Be careful whenremoving the switch. The clips are veryfragile and break easily.

3. To remove the air pressure relief valve:

a) Remove the secondary interlock switch(see step 2 for the procedure).

b) Remove the two T-10 torx flat-headscrews and remove the relief valve.

Wht Wire(Com)

Blu Wire(N.O.)

Air PressureRelief Valve

Air PressureRelief Valve





WARNING

Screw

Screw

SecondaryInterlock Switch

2-11

Wht, Gry, &Wht Wires(Com)

MonitorSwitch

Brn Wire (N.O.)

2 Gry Wires (N.C.)

d) Disconnect the wires from the primaryinterlock and monitor switch terminals.A switch is mounted on both sides ofthe bracket.

e) Unclip and remove the primary interlockand monitor switches from the bracket.NOTE: Be careful when removing theswitches. The clips are very fragile andbreak easily.

IMPORTANT NOTE: If safety interlock/moni-tor switch replacement, or adjustment, is re-quired, you must reconnect and perform acontinuity check on the monitor circuit.

4. To remove the primary interlock andmonitor switches:

a) Pull the microwave oven out of theoven cabinet approximately 6 so youcan access the switches (see pages2-8 & 2-9 for the procedure).

b) Open the microwave oven door.

c) Remove the two T-10 torx flat-headscrews from the primary interlock andmonitor switch bracket.

PrimaryInterlockSwitch

Red & Blk Wires (Com)

Gry & Blk Wires (N.O.)

2 Brn Wires (N.C.)

Primary Interlock & Monitor Switch Bracket Screws

Turn SwitchAssembly

Around

2-12

REMOVING THE GRILL THERMAL FUSEAND THE GRILL ELEMENT ASSEMBLY


2. Remove the microwave oven from theoven cabinet (see pages 2-8 & 2-9 for theprocedure).

The microwave oven components describedon these pages are shown below.


b) Remove the two thermal fuse mountingscrews.

4. To remove the grill element assembly:

a) Remove the two T-10 torx screws fromthe plate over the left end of the grillelement bracket and remove the plate.

Wires

Grill ThermalFuse Screws

Plate

Screw

Screw





WARNING 3. To remove the grill thermal fuse:a) Disconnect the two wires from the ter-minals.

Grill ElementAssembly

GrillThermal Fuse

2-13

c) Slide the grill element assembly to theleft and release the slots from the lock-ing tabs. NOTE: It may take a moderateamount of force to do this.

d) Remove the two T-10 torx screws fromthe grill thermal fuse bracket and re-move the fuse and bracket.

e) Remove the two hex nuts from the grillelement studs and remove the wires.

Grill Element Assembly

Unlock

Locking Tab

Thermal Fuse Bracket Screws

Element Hex Nut Element Hex Nut

b) Remove the two T-10 torx screws fromthe bracket over the left end of the grillelement assembly and raise the bracketslightly.

Screw

Screw

Bracket

2-14

REMOVING THE CONVECTION TEMPERATURE SENSOR,THE HALOGEN LAMP, AND THE CAVITY THERMAL FUSE




c) Remove the T-10 torx screw from thesensor.

d) Remove the two sensor wires from theharness.

Screw

Screw

Bracket


b) Remove the two T-10 torx screws fromthe bracket over the left end of the grillelement assembly and raise the bracket.

Plate

Screw

Screw

Screw

ConvectionTemperature

Sensor





WARNING 3. To remove the convection temperaturesensor:a) Remove the two T-10 torx screws from

the plate over the left end of the grillelement bracket and remove the plate.

CavityThermal Fuse

ConvectionTemperature Sensor

HalogenLamp

2-15

4. To remove the halogen lamp:

a) Unclip the wire retainer and remove it.

5. To remove the cavity thermal fuse:

a) Disconnect the wires from the termi-nals.

b) Remove the T-10 torx screw from thecavity thermal fuse.

b) Remove the lamp from the holder andremove the wires from the harness.

Wire Retainer

Cavity Thermal Fuse Screw

HalogenLamp

Holder

2-16

Screw (1 of 4)

Mounting Cover

REMOVING THE CONVECTION THERMAL FUSE,CONVECTION ELEMENT, AND CONVECTION FAN MOTOR



3. Position the microwave oven with the backfacing you.

4. To remove the convection thermal fuse:


b) Remove the two T-10 torx screws.

5. To remove the convection element:


b) Remove the four T-10 torx screws fromthe mounting cover.

c) Turn the cover around so that the con-vection element faces you and removethe three T-10 torx screws from theelement.

Screw

Screw

Convection Thermal Fuse






WARNING

ConvectionElement Wires

Back Of Oven

Screw

Screw

Screw

Convection Element

2-17

CAUTION: Be very careful when han-dling the fan in the next step. The edgesare very sharp.

c) Remove the acorn nut from the fanmotor shaft and remove the fan and flatwasher beneath it.

Wires Convection Fan Motor

d) Remove the three T-10 torx screwsfrom the insulation cover and removethe cover and insulation.

f) Remove the three 5/32 allen screwsfrom the motor and remove the motorfrom the cover.

e) Unsnap the e-ring from the motor shaftand remove the ring and flat washer.

6. To remove the convection fan motor:

a) Remove the convection element (seestep 5). NOTE: It is not necessary toremove the convection element to re-move the fan motor. However, there isa possibility of damaging the elementwhile removing the motor, so it is advis-able to remove it.

b) Disconnect the wires from the convec-tion fan motor terminals.

Cover Screws (1 of 3)

Insulation CoverInsulation

E-Ring

Flat Washer

Allen Screw(1 of 3)

Acorn Nut

Convection Motor Fan

2-18

REMOVING THE COOLING FAN MOTOR & AIR VENT SOLENOID




3. Open the microwave oven door and re-move the turntable and the spindle fromthe turntable motor shaft.

4. Remove the right side panel (see step 2bon page 2-10 for the procedure).

5. Position the microwave oven on its leftside.

6. Remove the four T-10 torx screws fromthe cooling fan housing.

7. Position the unit with the high voltagecomponent side facing you.

8. Pull the cooling fan assembly out of theunit.

9. To remove the cooling fan motor:


b) Unclip the bottom cover from the cool-ing fan housing and remove the cover.

c) Pull the fan off the motor shaft.

Wires

Bottom Cover





WARNING

Motor Shaft

Fan

Torx Screws (1 of 4) Cooling Fan Housing

2-19

d) Remove the T-10 torx screws from thefan motor and remove the motor fromthe housing.

Fan Motor Torx Screws

10. To remove the air vent solenoid:


b) Remove the T-10 torx screw.

c) Unclip the actuator from the solenoidshaft.

The microwave oven component described onthis page is shown below.

Actuator

Air Vent Solenoid

Wires

Torx Screw

Air Vent Solenoid

2-20

REMOVING THE MAGNETRON THERMAL FUSEAND THE MAGNETRON



3. Open the microwave oven door and re-move the turntable and rollers.


CAUTION: Discharge the high voltage ca-pacitor terminals with a 20,000 resistor tochassis ground.


c) Remove the remaining T-10 torx screwfrom the thermal fuse.

5. To remove the magnetron thermal fuse:

a) Remove the wires from the thermalfuse cover clips.

b) Remove the T-10 torx screw from thethermal fuse cover and remove thecover.





WARNING

Screw Thermal Fuse Cover

MagnetronThermal Fuse

Magnetron

Magnetron Thermal Fuse

Screw


2-21

d) Disconnect the two filament wires fromthe magnetron terminals.

c) Unclip the two wires from the right airduct and remove the duct.

e) Remove the four T-16 magnetron torxscrews and remove the magnetron.NOTE: Move the left air duct back farenough to access the magnetronscrews.

IMPORTANT REASSEMBLY NOTE: Whenyou mount the magnetron, loosely install thefour screws, and then tighten them in a cross-tightening (opposite corner) sequence. Makesure that the base of the magnetron staysparallel with the mounting surface so that it isnot tilted; otherwise, it may not work properly.

Screw (1 of 4)

Filament Wires

Left Air Duct Screw Right Air Duct Screw

Wire Clip

6. To remove the magnetron:

a) Remove the magnetron thermal fuse(see step 5).

b) Remove the T-16 torx screws (1 each)from the left and right air ducts.

2-22

REMOVING THE HIGH VOLTAGE TRANSFORMER





The microwave oven component described onthese pages is shown below.


5. Disconnect the two wires from the primaryterminals of the high voltage transformer,and the three secondary wires from themagnetron, and high voltage capacitorterminals.

3 Secondary Wires

2 Primary Wires





WARNING Screw Air Duct Wire Clip

4. Remove the T-16 torx screw from the airduct, unclip the two wires, and remove theduct.

High VoltageTransformer

2-23

6. Remove the two T-10 torx screws from thehigh voltage transformer, then pull the twobase tabs out of the chassis, and removethe high voltage transformer.

Base Tab Screws

High Voltage Transformer

2-24

REMOVING THE LINE FUSE & FUSEHOLDER, THE HIGHVOLTAGE RECTIFIER, & HIGH VOLTAGE CAPACITOR







5. To remove the high voltage rectifierand high voltage capacitor:

a) Remove the wires from the fuseholderand high voltage capacitor terminals.

Wire Fuse Wire

Screw

Fuseholder

HV Capacitor Fuseholder

Mounting Bracket Screw (1 of 2)





WARNING 4. To remove the line fuse and fuseholder:a) Remove the line fuse from the fuse-holder.

b) Remove the wires from the fuseholderterminals.

c) Remove the T-10 torx screw from thefuseholder.


High VoltageCapacitor

Line Fuse

b) Remove the mounting bracket screwsfrom the rear panel.

2-25

e) Remove the high voltage rectifier leadfrom the high voltage capacitor termi-nal.

f) Remove the mounting screw from thecapacitor clamp and remove the highvoltage rectifier and capacitor from themounting bracket.

d) Lift the arm out of the rear panel track,and remove the mounting bracket as-sembly.

c) Unclip the wires from the mountingbracket clip.

Wire Clip

Bracket Arm


Clamp Screw

MountingBracket

High Voltage Capacitor

2-26

REMOVING THE TURNTABLE MOTOR



3. Open the microwave oven door and re-move the turntable and rollers.

4. Pull the spindle off the turntable motorshaft.

5. Position the microwave oven on its leftside.

6. Use a pair of wire cutters and cut the metalbetween the two holes at the four indi-cated locations on the turntable motorknockout, and remove it.


REASSEMBLY NOTE: Use two #6 x 1/4screws to mount the knockout over the turn-table motor cutout.

7. Remove the T-10 torx screws from theturntable motor and remove the motor.

8. Disconnect the wires from the turntablemotor terminals.

#6 x 1/4 Screws

Knockout

Knockout

Cut Here





WARNINGWires

Torx Screws

2-27

REMOVING THE OVEN DOOR HANDLE& FRONT DOOR GLASS



3. Remove the left and right side panels fromthe microwave (see step 2b on page 2-10for the procedure).

4. Remove the screws (1 each) from the twoclips at the bottom of the door and removethe clips.


CAUTION: When you remove the front doorglass and handle in the next step, be carefulwhen you remove the two screws that hold theassembly together. Hold the door open whileyou remove the screws; otherwise the door willspring closed. Also, be careful not to drop theglass and handle assembly when you removethe screws.

5. Open the oven door and remove the twoscrews from the inside of the door panel,then remove the front door glass andhandle from the door, and carefully closethe oven door.

6. Remove the four screws from the handlesupport bracket, and remove the handleand bracket from the front door glass.

Front Door Glass

Door Handle Screws

Handle Support Bracket

Screw Screw

Door Panel Front Door Glass





WARNING

Clip ClipBottom Of Door

Screw

2-28

4. Remove the T-10 torx shoulder screwsfrom the door stops (1 on each side).

REMOVING THE OVEN DOOR & THE INNER GLASS



3. Remove the left and right side panels fromthe microwave (see step 2b on page 2-10for the procedure).

NOTE: The inner door glass cannot be re-placed separately. The oven door and innerglass must be replaced as an assembly.






WARNING

5. Remove the T-15 torx screws from thesides of the door brackets (1 on eachside).

6. Remove the two bottom screws from thedoor panel and remove the panel.

Screw Door Panel Screw

Bottom Of Unit

T-15 Torx Screw Right Door Bracket

T-10 Torx Shoulder Screw Right Door Stop

2-29

7. Remove the four indicated T-10 torx screwsfrom the bottom of the door brackets.

8. Pull the brackets out of the oven slots andremove the door assembly from the micro-wave.

Door Brackets

Screws Bottom Bracket Screws

9. If you are replacing the oven door andinner glass assembly, remove the frontdoor glass and the handle (see page 2-27for the procedure).

2-30

LOWER OVEN COMPONENTS

Components Accessible From The Front

Lower Door Latch Assembly

Oven TemperatureSensor

Broil Element

Meat Probe Jack(Side Access)

Right Halogen Lamp

Left Halogen Lamp

Convection BakeElement

Components Accessible From The Rear

Lower BlowerMotor Assembly

Oven ShutdownThermal Fuse


Hidden Bake Element

2-31






WARNING

Lower Air Vent

4 Air Vent Screws

REMOVING THE LOWER OVEN DOOR LATCH ASSEMBLY

2. Remove the racks from inside the oven.

3. Remove the four screws from the lower airvent and remove the air vent.


The oven component described on this page isshown below.

4. Use an angled screwdriver and removethe two screws from the lower oven doorlatch assembly.

Screw Screw

5. Remove the lower oven door latch assem-bly and disconnect the wires from the twoswitches and the solenoid terminals.

Lower Oven Door Latch Assembly

Solenoid

Door Switch

Latch Switch

Lower Oven Door LatchAssemblyLower Air Vent

2-32

REMOVING THE BROIL ELEMENT








WARNING

Broil Element


4. Carefully pull the element forward so thatthe terminal connectors are through theoven liner holes, and disconnect the wiresfrom the terminals.

3. Remove the two front bracket screws andtwo rear bracket screws from the broilelement.

Element Wires

Front Bracket Screws

Rear Bracket Screws

2-33

REMOVING THE OVEN TEMPERATURE SENSOR1. Disconnect the electrical power to the

microwave/oven combination.


3. Remove the two mounting screws fromthe oven temperature sensor and pull theconnectors out of the mounting hole in theoven liner.

4. Disconnect the sensor connector from themain wire harness connector.

OvenTemperature

Sensor

Sensor ConnectorCAUTION: When you work on the microwave/oven combination, be careful when handlingthe sheet metal parts. Sharp edges may bepresent, and you can cut yourself if you are notcareful.





WARNING

Oven TemperatureSensor


2-34

REMOVING A HALOGEN LAMP ASSEMBLY



5. Pull the halogen bulb out of the socket.

6. Pull the halogen socket assembly out ofthe oven liner and cut the wires near thesocket terminals.

7. Cut the new halogen lamp socket wires tothe proper length.

8. Remove 3/8 of insulation from the cutwires on the wire harness and the halogenlamp socket. Splice the halogen lampsocket wires to the harness wires, andtwist two wire nuts over the bare wireends.

Mounting Screw

Halogen LampAssembly

Socket Assembly

Cut Wires Here






WARNING


3. Remove the lens from the halogen lampsocket by lifting the end near the mountingscrew and unsnapping it.

4. Remove the screw from the halogen lampassembly.

Halogen LampAssemblies

Lift Lens Here

Halogen Bulb

2-35

REMOVING THE MEAT PROBE JACK








WARNING


3. Remove the hex nut from the meat probejack.

Meat Probe Jack

Meat Probe Jack

Hex Nut

5. Remove the meat probe jack access panelfrom the right side of the unit. Use a pair ofsmall cutters to clip the bridge.

Meat Probe Jack

AccessPanel

Clip Bridge

Right SideOf Oven

6. Push aside the insulation, pull the meatprobe jack out of the access hole, andremove the star washer from the jack.

7. Cut the wires near the lugs of the old meatprobe jack, then use two small wire nuts,and splice the new jack to the oven wires.

Meat Probe Jack

REASSEMBLY NOTE: When you install thenew jack, be sure to place the star washer fromthe old jack on the threaded end of the newone. After you have installed the jack, mountthe access cover with two #8 x 1/4 screws.

4. Pull the oven out of its mounting locationapproximately 8, (see page 2-6 steps 1through 5 for the procedure), so that youcan access the meat probe jack accesspanel on the right side.

Access Cover

#8 x 1/4 Screw

2-36

REMOVING THE REAR PANELS


2. Pull the oven out of its mounting location,(see page 2-6 steps 1 through 5 for theprocedure), so that you can access therear panel.

4. To remove the top rear panel, remove theremaining seven screws.

Top Rear Panel

3. To remove the bottom rear panel, removethe eleven screws.

Bottom Rear Panel






WARNING

2-37

REMOVING THE CONVECTION BAKE ELEMENT &FAN MOTOR ASSEMBLY

5. To remove the convection bake ele-ment:

a) Remove the two screws from the con-vection bake element.

b) Pull it forward so you can access theterminals.

c) Disconnect the wires from the elementterminals.

Screw 1 of 3

Notch

Convection Cover

Convection BakeElementScrew

Screw

Element Terminals






WARNING

The oven components described on thesepages are shown below.

position the cover with the notch as shownwhen you reinstall it.


2. Remove the oven door from the oven (seepage 2-42).

Continued on the next page.

Convection BakeElement & Fan Motor


4. Remove the three screws from the con-vection cover and remove the cover fromthe rear of the oven liner. Note the locationof the notch in the cover. Be sure to

2-38

6. To remove the convection fan motor:

a) If not already done, remove the con-vection cover and the convection bakeelement from the rear of the oven liner(see page 2-37).

b) Use a 10 mm (7/16) socket and re-move the hex nut from the convectionfan. NOTE: The nut has a left-rotationthread for removal.

10 mm (7/16) Hex Nut

Convection Fan

d) Pull the oven out of its mounting loca-tion, (see page 2-6 steps 1 through 5 forthe procedure), so that you can accessthe rear panels.

e) Remove the bottom rear panel from theoven (see page 2-36).

c) Remove the three front convection fanmotor screws from the rear of the ovenliner.

Convection Fan Motor Front Screw (1 of 3)

f) Remove the two rear convection fanmotor mounting screws from the oven,and remove the motor from the rear ofthe oven.

BACK OF OVEN


Convection Fan Motor Rear Screw (1 of 2)

Convection Fan Motor Terminals

2-39

REMOVING THE LOWER BLOWER MOTOR ASSEMBLY


2. Pull the oven out of its mounting location,(see page 2-6 steps 1 through 5 for theprocedure), so that you can access therear panels.

3. Remove the bottom rear panel from theoven (see page 2-36).


4. Remove the three mounting screws andthe air vent screw from the blower motorassembly and remove the assembly fromthe oven.

1 Right Screw

Lower Blower Motor Assembly

Blower MotorAssembly

2 Left Screws

5. Peel the foam tape off the air duct screw,remove the screw from the duct, and re-move the lower blower motor assembly.

Foam Tape OverAir Duct Screw

Air Duct






WARNING

BACK OF OVEN

2-40

Cover Flange& 2 Screws

Cover Flange& 2 Screws

REMOVING THE OVEN SHUTDOWN THERMAL FUSE &THE HIDDEN BAKE ELEMENT


2. Pull the oven out of its mounting location,(see page 2-6 steps 1 through 5 for theprocedure), so that you can access therear panel.

3. Remove the bottom rear panel from theoven (see page 2-36).

The oven components described on thesepages are shown below.

4. To remove the oven shutdown thermalfuse:

a) Remove the two screws from the ovenshutdown thermal fuse and remove thefuse from the rear of the oven.

b) Disconnect the wires from the thermalfuse terminals.

5. To remove the hidden bake element:

a) Remove the four screws from the hid-den bake element cover flanges.

MountingScrew (1 of 2)

Oven Shutdown Thermal Fuse






WARNING

Oven ShutdownThermal Fuse

Hidden Bake Element

BACK OF OVEN

2-41

b) Bend the cover flanges down as far asthey will go.

c) Use a pen knife or a single-edged razorblade and cut the insulation blanket, asshown. Be sure to separate the insula-tion blanket as cleanly as possible.

Cut Insulation Blanket

Bend CoverFlange Down

Bend CoverFlange Down

e) Remove the four mounting bracketscrews and the two hidden bake ele-ment bracket screws.

Remove Two Screws

Remove Four Screws

f) Carefully pull the hidden bake elementand its mounting bracket out of theoven.

Pull Out Hidden Bake Element

d) Carefully move the upper and lowersections of the insulation blanket out ofthe way so that you can access thehidden bake element and its mountingbracket.

2-42

REMOVING THE OVEN DOOR

CAUTION: Do not lift the oven door by itshandle.

To remove the oven door:

1. Install a pin in the hole of each oven doorhinge hanger.

2. Close the oven door as far as the two pinswill allow.

3. Grasp the sides of the door and lift the dooruntil it stops, then pull the hinge hangersout of the slots.

Door Pin

Hinge Hanger

Hinge Hanger

To reinstall the oven door:

1. Grasp the sides of the door and tilt it backat a slight angle, then insert the hingehangers into the hinge slots as far as theywill go.

2. Rotate the top of the door towards theoven so the hinge hangers fit onto thesupport pins.

3. Close the oven door as far as the pins willallow, and make sure that the hinge hang-ers are fully seated on the support pins. Ifthey are not seated properly, the door willnot close tightly and may be off-center. Toseat the hinge hangers, open the doorslightly, and push in on the bottom until thehangers are fully seated.

4. Open the oven door to its fully open posi-tion and remove the two hinge hangerpins.

5. Close the oven door completely and checkit for proper operation and alignment.


2-43

REMOVING THE OVEN DOOR GLASS, HINGES, & HANDLE

1. Remove the oven door from the oven (seepage 2-42).

2. Place the oven door on a padded worksurface with the front decorative glassfacing down.

3. Remove the two top door liner screws andthe two door glass bracket screws, and liftthe liner assembly off the decorative doorglass and handle.

4. To remove the outer door glass:

a) Remove the three outer glass holderscrews and two outer glass bracketscrews from the door liner.

b) Lift the outer glass with the glass holderoff the door liner.

c) Remove the bracket.

5. To remove the center door glass, re-move the bottom bracket, (it is loose), andslide the two top corners of the glass out ofthe door liner slots.

Top Liner Screws

Door GlassBracket Screws

Outer Glass Holder Screws

Outer Glass Bracket Screws

Outer Door Glass

Center Door Glass Corners

Remove Loose Bracket

Center Door Glass

Continued on the next page.


2-44

7. To remove the door handle, remove thetwo door handle screws from the bracket.

b) Lift the other side of the door liner,remove the two screws for the otherhinge, and remove the hinge.

c) Lift the inner door glass liner cover offthe liner.

6. To remove the hinges and the innerdoor glass:

NOTE: You will have to remove both hinges toremove the inner door glass from the oven doorliner.

a) Lift either side of the door liner, removethe two door hinge screws, and removethe hinge.

Inner Door Glass

Insulation

Hinge Screws (4 total)

Inner Door Glass Cover

Inner Door Glass

d) Remove the insulation and the innerdoor glass.

Door HandleBracket & Screws

(2 each)

2-45

REMOVING THE OVEN DOOR GASKET

1. Open the oven door to its fully open posi-tion.

2. Remove the screw from the door gasketbracket and remove the bracket from theoven.

REASSEMBLY NOTE: When you install thenew gasket, make sure that all of the clips areseated in their liner holes, and that the ends ofthe gasket are pushed fully into their holes. Usethe pointed end of a pencil to push the gasketends into the holes.

Gasket Clips

Gasket BracketScrew

Door Gasket

3. Pull the ends of the gasket out of the linerholes.


2-46

NOTES

3-1

COMPONENT TESTINGBefore testing any of the components, performthe following checks:

The most common cause for control failure iscorrosion on connectors. Therefore, discon-necting and reconnecting wires will be nec-essary throughout test procedures.

All tests/checks should be made with a VOMor DVM having a sensitivity of 20,000 ohms-per-volt DC, or greater.

Check all connections before replacing com-ponents, looking for broken or loose wires,failed terminals, or wires not pressed intoconnectors far enough.

Voltage checks must be made with all con-nectors attached to the boards.

Resistance checks must be made with powercord unplugged from outlet, and with wiringharness or connectors disconnected.

THE GENERAL OVEN COMPONENTS





WARNING

Slots

Pin 1

Refer to page 2-4 for the procedure for servic-ing the low voltage transformer.


2. Disconnect the low voltage transformerconnector from the oven control board.

3. Set the ohmmeter to the R x 1 scale.

4. Touch the ohmmeter leads to the indi-cated slots of the low voltage transformerconnector. The meter should indicate asfollows:

1st SecondaryPins 1 & 2 = Less than 1 .2nd SecondaryPins 3 & 4 = Less than 1 .3rd SecondaryPins 5 & 6 = Less than 1 .PrimaryPins 8 & 10 = Approximately 5 .

LOW VOLTAGE TRANSFORMER

Wh - Bk - Vt Vt Br Br Y Y

10 1

3-2

MAIN LINE FUSE









WARNING

Refer to page 2-4 for the procedure for servic-ing the light power supplies.

NOTE: The measurements are the same forboth light power supplies.


2. Disconnect one of the wires from each ofthe light power supply LOAD and LINEterminals.


4. Touch the ohmmeter leads to the LOADterminals. The meter should indicate lessthan 1 .

5. Touch the ohmmeter leads to the LINEterminals. The meter should indicate be-tween 40 and 45 .

LIGHT POWER SUPPLIES

Refer to page 2-4 for the procedure for servic-ing the main line fuse.


2. Disconnect the wires from the line fuseterminals.


4. Unclip the fuse from the fuseholder.

5. Touch the ohmmeter leads to the ends ofthe fuse. The meter should indicate conti-nuity if the fuse is good. If the fuse is open,the meter will indicate infinity.

3-3

Refer to page 2-26 for the procedure for servic-ing the turntable motor.


2. Disconnect the wires from the turntablemotor terminals.


4. Touch the ohmmeter leads to the motorterminals. The meter should indicate ap-proximately 25 .

THE MICROWAVE OVEN COMPONENTS

TURNTABLE MOTOR

Refer to page 2-18 for the procedure for servic-ing the cooling fan motor.


2. Disconnect the wires from the cooling fanmotor terminals.


4. Touch the ohmmeter leads to the motorterminals. The meter should indicate ap-proximately 25 .

COOLING FAN MOTOR









WARNING

3-4

UPPER BLOWER MOTOR

Refer to page 2-6 for the procedure for servic-ing the upper blower motor.


2. Disconnect the wires from the blower motorterminals.


4. Touch the ohmmeter leads to the motorterminals. The meter should indicate be-tween 10 and 15 .

CONVECTION FAN MOTOR

Refer to page 2-16 for the procedure for servic-ing the convection fan motor.


2. Disconnect the wires from the convectionfan motor terminals.


4. Touch the ohmmeter leads to the motorterminals. The meter should indicate be-tween 15 and 21 .









WARNING

3-5

Refer to page 2-14 for the procedure for servic-ing the convection temperature sensor.


2. Disconnect the convection temperaturesensor connector from the oven controlboard.

3. Set the ohmmeter to the R x 1K scale.

4. Touch the ohmmeter leads to the sensorconnector pins. The meter should indicateas shown in the chart below:

Room Ambient: 15C (59F) 20C (68F) 25C (77F) 30C (86F)

Resistance (K): 294.7-471.2 233.2-366.9 185.7-287.7 148.8-227.2

Convection Temperature Sensor Chart





WARNING

CONVECTION TEMPERATURESENSOR

3-6

Cavity Grill & Convection

Refer to the cavity thermal fuse (page 2-14),the grill thermal fuse (page 2-12), the convec-tion thermal fuse (page 2-16), and the magne-tron thermal fuse (page 2-20) for the servicingprocedures.


2. Disconnect the wires from the terminals ofthe thermal fuse under test.


4. Touch the ohmmeter leads to the thermalfuse terminals. The meter should indicateas follows:

Magnetron





WARNING

CAVITY, GRILL, CONVECTION, &MAGNETRON THERMAL FUSES

Opens @ 165C (329F)

Non-Resettable

Opens @ 175C (347F)

Closes @ 125C (257F)

Opens @ 145C (293F)


Opens @ 145C (293F)


Cavity:

Grill:

Convection:

Magnetron:

3-7

CONVECTION ELEMENT

Refer to page 2-16 for the procedure for servic-ing the convection element.


2. Disconnect the wires from the convectionelement terminals.


4. Touch the ohmmeter leads to the elementterminals. The meter should indicate be-tween 10 and 20 .

GRILL ELEMENT ASSEMBLY

Refer to page 2-12 for the procedure for servic-ing the grill element assembly.


2. Disconnect the black element wire fromthe grill thermal fuse terminal.


4. Touch one of the ohmmeter leads to themetal strip between the ends of the ele-ments. Touch

4317316 kac-25 kitchenaid built-in microwave oven combination

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