Fix Microwave Ovens Like A Pro! Click here to learn about how to repair commercial microwave ovens Click here to learn how to repair the microwave ovens used in restaurants and commercial kitchens Used Commercial Microwaves for Sale
This Page Includes the Brands:
AMANA through FRIGIDAIRE

Page 1
© 1998-2013 J. Carlton Gallawa
All Rights Reserved Worldwide
Updated June 2012
A to J | K to 0 | P to Q | R to Z | Home Page | Safety Info | Back | CD-ROM

Instructions on How To Diagnose and Repair Microwave Ovens

    FREE Super Microwave Oven Troubleshooter
    PUZZLED by microwave repair? Fix any microwave oven with this new FREE troubleshooting guide
  1. After reading the safety precautions , find the brand and model number, or the number closest to the model you are repairing.
  2. Find the symptom(s) that most closely match the symptom(s) being displayed by the oven you are repairing.
  3. Follow the specific troubleshooting and/or repair instructions to complete the repair. Click on highlighted text for a detailed explanation of that procedure.
  4. Since this database is constantly being updated and appended, if you don't find what your looking for, try again at a later time.
  5. Click here    if you would like to be notified by e-mail when this page is updated. 
Please Note:
  • The manufacturers' part numbers and prices listed here are subject to change without notice.
  • The individual model numbers are not necessarily arranged in numerical order
We hope that you find the information here helpful ...

Important Safety Information

microwave oven safety precautions Repairing a microwave oven is a dangerous task. For your personal safety, please do not proceed unless you fully understand and are prepared to follow carefully these appropriate safety precautions .

Disclaimer: The author assumes no liability for any incidental, consequential or other liability from the use of this information. All risks and damages, incidental or otherwise, arising from the use or misuse of the information contained herein are entirely the responsibility of the user. do good work Although careful precaution has been taken in the preparation of this material, we assume no responsibility for omissions or errors.

Copyright © 1996-2012 by J. Carlton Gallawa
All Rights Reserved Worldwide
© Copyright Information

MICROWAVE OVEN REPAIR CASE HISTORY DATABASE

AMANA cavity lip illustration
Model: M84T
Symptom: Arcing in cooking area.
Problem: Accumulation of food and cooking debris beneath front cavity lip.
Solution: Thoroughly clean all debris and carbon build up from under cavity lip (use a tool such as a plastic knife to penetrate underneath the lip opening and clear out all burned-on debris. Then use light sand paper to sand away any carbon build up. Finally, install a cavity lip protector, Amana part # R0803571. Price: about $8.00
AMANA COMMERCIAL
Models: Late model RC-chassis models (WARNING: PROFESSIONAL TECHNICIANS ONLY)
Symptom: Display shows error code: Err5
Problem: Shorted side or top touch panel (Note: if a pad is pressed for more than 30 seconds, this error code will appear)
Solution: OBSERVE SAFETY PRECAUTIONS. Unplug oven. Disconnect top touch panel ribbon connector from LV board. Operate oven for about a minute to see if "S1" reappears. If "S1" does not appear, replace top touch panel. If "S1" does reappear, reconnect ribbon connector and follow same procedure for side touch panel.
Solution: Replace appropriate touch panel
AMANA COMMERCIAL
Models: ACE, CRC, HDC, DEC, MCHDC, MRC, RC, UC, UHDC (WARNING: FOR PROFESSIONAL TECHNICIANS ONLY)
Symptom: Premature failure of high-voltage diodes
Problem: Improper bending of diode leads when installing new diode
Solution: Avoid bending leads of the diode within 1/4-inch (6mm) of plastic diode body. If the bend is made to close, it creates too much stress on the plastic body of the diode.
(1)Using 2 pairs of needle-nose pliers, hold the lead 1/4-inch from the body with one pair and make the bend with the other pair.
(2) When tightening the ring connector to ground, use needle-nose pliers to support the ring connector to prevent it from twisting and bending.
AMANA COMMERCIAL
Models: AMC2000MPP (WARNING: FOR PROFESSIONAL TECHNICIANS ONLY)
Symptom(s):(1) Door hanging down. (2) Inner door molding cracked (3) Will not go into cook mode
Problem(s): (1) Door hinges (bushings) have worn prematurely, causing the (2) plastic inner door to strike the metal cavity wall when closing the door, and (3) producing a severe misalignment of the door latch mechanism.
Solution(s): (1) Install a hinge upgrade kit, Amana part # R0156889. Price: about $18.00 (2) Replace inner door assembly. Original Amana part # D7143803. (3) Adjust primary interlock switch for proper actuation and sequence
AMANA COMMERCIAL
Model: RC14S (WARNING: FOR PROFESSIONAL TECHNICIANS ONLY)
Symptom: Certain pads will not respond.
Problem: Defective touch panel (switch panel).
Solution: Replace touch panel. Original Amana part # D7577807
AMANA COMMERCIAL
Model: RC14SE (WARNING: FOR PROFESSIONAL TECHNICIANS ONLY)
Symptom: Smoking and burning odor during cook. Weak heat.
Problem: Although this appears to be a simple case of a shorted high voltage transformer, there is actually a culprit that might be quite unanticipated: A shorted high voltage capacitor, which is causing excessive current flow through the windings of the high voltage transformer, thereby causing the transformer to overheat and smoke.
Test: High Voltage Capacitor Test Procedure
Solution: Replace high voltage capacitor, Amana part # D85479-20. Price: about $11.00. If the high voltage transformer is damaged, it too must be replaced. Part # R0114320, list price: $77.38. The line fuse may also have be weakened, so it too should be replaced. Amana part # M0805201. Price: $4.50
AMANA COMMERCIAL
Models: RC16MP, RC17, RC17SD, RC20A, DQ22HS, RC22, RC22LW, RC22S, RC22MP, RC22MPS, MC22MP, MC22MPT, MC22MPT2, KFC1, RC27, WDYRC (WARNING: FOR PROFESSIONAL TECHNICIANS ONLY)
Symptom: Error code: "S1" appears in display
Problem: Defective top or side touch panel (shorted)
Test: OBSERVE SAFETY PRECAUTIONS. Unplug oven. Disconnect top touch panel ribbon connector from LV board. Operate oven for about a minute to see if "S1" reappears. If "S1" does not appear, replace top touch panel. If "S1" does reappear, reconnect ribbon connector and follow same procedure for side touch panel.
Solution: Replace appropriate touch panel
AMANA COMMERCIAL
Models: RC17 / RC22 (WARNING: FOR PROFESSIONAL TECHNICIANS ONLY)
Symptom: Error code: "CS" appears in display
Problem: Current Sense error: Current sensing circuit detects low current (amperage) draw due to failure of one or more magnetron circuits.
Possible Causes: Failure of any one or more of the following components: HV board (see next step), HV diode (High Voltage Diode Test), HV capacitor (see next step), interlock switch (Interlock Switch Test), triac (Triac Test Procedure ), HV transformer (see next step), magnetron (Magnetron Test)
Tests: CAREFULLY OBSERVE SAFETY PRECAUTIONS. Inspect foil side of HV board for burned tracks (foil) toward lower side of board. If burned, check HV capacitors (High Voltage Capacitor Test Procedure) and HV transformers (High Voltage Transformer Test) for a short. Otherwise test other components as outlined above.
Solution: Replace defective components as necessary. If applicable, repair foil trace on HV board.
AMANA COMMERCIAL
Models: RCS / RFS / HDC (WARNING: FOR PROFESSIONAL TECHNICIANS ONLY)
Symptom: Error code: "F5" appears in display
Problem: Defective touch panel
Solution: Replace the touch panelMagnetron bracket
AMANA / MENUMASTER COMMERCIAL
Models: RCS10DA, RCS10PBDA, RCS10A, RCS10MPA, RCS10MPSA,
RFS9B2, RFS12MPSA, RFS12SW2A, RFS18MPS (WARNING: FOR PROFESSIONAL TECHNICIANS ONLY)
Symptom: Oven shuts down intermittently and/or has repeated magnetron failures
Problem: Air-flow bracket above the magnetron is missing creating a lack of cooling air for the magnetron. This results in intermittent oven shut down due to the action of the magnetron TCO; this may also cause repeated magnetron failures.
Solution: Reinstall magnetron bracket, Amana part # 53001622—see illustration to right
AMANA COMMERCIAL
Models: RCS / RFS / HDC (WARNING: FOR PROFESSIONAL TECHNICIANS ONLY)
Symptom: Error codes: Any one of the following error codes appear in display: F1, F2, F3, F4, F6
Problem: Defective control board
Solution: Replace the control board
 
AMANA COMMERCIAL
Models: RCS / RFS / HDC (WARNING: FOR PROFESSIONAL TECHNICIANS ONLY)
Symptom: Error code: "F5" appears in display
Problem: Defective touch panel
Solution: Replace the touch panel
AMANA COMMERCIAL
Model: RMC720 (WARNING: FOR PROFESSIONAL TECHNICIANS ONLY)
Symptom: Electrical burning smell and no heat
Problem: Burned connection on upper interlock switch
Test: Interlock Switch Test
Solution: Replace interlock switch, part # R0852501. Price: $7.00. Repair burned connector(s) by either (1) replace burned slip-on connector(s), or (2) cut off burned connectors and solder the harness wires directly to the appropriate switch terminals.
AMANA COMMERCIAL
Model: RR-700 (WARNING: FOR PROFESSIONAL TECHNICIANS ONLY)
Symptom: In cook mode, oven only counts down--no blower, no heat
Problem: Control relay (24 VDC) not being energized due to defective relay-drive circuit on main control board
Test: Test the relay itself as follows: Observe important safety precautions . Remove harness wires from control relay coil terminals and test for a normal resistance of about 500 to 900 ohms.
Solution: Remove main control panel. Determine relay drive circuit components by tracing relay coil wires back to the circuit board. Test all relevant transistors. Replace defective transistor(s).
AMANA COMMERCIAL
Model: MC22MP (WARNING: FOR PROFESSIONAL TECHNICIANS ONLY)
Symptom: Will not program
Problem: Extended memory board is defective
Test: Observe the horizontal dashes on the display. If the fifth dash to the right is above the rest, the extended memory board is normal. If the fifth dash is even with, or below the rest, the extended memory board is defective.
Solution: Replace the extended memory board, Amana part # 10936806. List price: $179.
AMANA
Model: M84TMA
Symptom: Oven will not "start"
Problem: Broken door latch
Solution: disassemble door and replace broken door latch (or door key). Amana part # R0805592 upper door key; R0805593 lower door key Price: about $0.58 each
AMANA
Model: RMC20CET6
Symptom: Blows the fuse and goes dead about 30 seconds after start of cook cycle.
Problem: Shorted high voltage transformer.
Test: High Voltage Transformer Test
Solution: Replace transformer. Amana part #.D7474103. Price: $143.53
AMANA COMMERCIAL
Model: RCS 720A (WARNING: FOR PROFESSIONAL TECHNICIANS ONLY)
Symptom: Door must be pushed or jiggled before oven will cook.
Problem: Defective switch module.
Solution: Replace switch module, part # R0163218. Price: about $28.00
BETTY CROCKER
Model: BC-1861
Symptom: Pressed "Start" and the clicked then went dead.
Problem: In-line fuse not secured in fuse holder.
Solution: Replace fuse and insure that it is securely inserted into holder. Fuse: $1.50
EMERSON
Model: AR501
Symptom: Popped and went dead during cook cycle
Problem: Shorted high voltage capacitor
Test: High voltage capacitor test procedure
Solution: Install new fuse, part # M0S0063; price, about $1.50. Replace HV capacitor (.65Mfd, 2000VAC), part # M0S0060. Price: about $17.00 wholesale.
EMERSON
Model: M3060
Symptom: Dead
Problem: Weakened fuse clips in the fuse receptacle causing fuse to melt due to resistive heat. Usually indicated by a bead of solder leaching out from either endcap and/or evidence of overheating (or burned spot) at the endcap, fuse clip, or terminal connection
Solution: Replace 15 amp fuse (about $1.00) and receptacle (about $2.00)
Additional Info: Generic fuse holders are available at appliance and electronic part suppliers.
FRIGIDAIRE
Model: MC-900M-2
Symptom: Went dead during cook
Problem: Weakened fuse clips on fuse receptacle causing fuse to melt due to resistive heat. Usually indicated by a bead of solder leaching out from either endcap and/or evidence of overheating (burned spot) at the terminal connection
Solution: Replace 15 amp fuse (about $1.00) and receptacle (about $2.00).
Additional Info: Generic fuse holders are available at appliance and electronic part suppliers.
FRIGIDAIRE
Model: RCM10J
Symptom: Heats unevenly
Problem: (1) After a period of years, the center of the grease shield begins to sag. This diminishes the air-swirling action that is required to rotate the antenna [which functions to evenly distribute the microwave energy]. (2) The foam-type air gasket material is deteriorated or missing. This gasket serves to channel air from the blower assembly into the antenna chamber where the air flow drives the rotating antenna.
Solution: (1) Replace grease shield, Amana part # D7544002, price about $19.00; and install new air gasket material. See Amana Air Gasket Replacement Procedure.
FRIGIDAIRE
Model: MC1355L-5
Symptom: Sparked out the back of the microwave.
Problem: Buildup of food debris causing high voltage arc-over from high voltage capacitor terminal to chassis ground.
Solution: Clean away debris, repair burned connections and dress high voltage wires away from metal edges.

To Page 2 (A to J) Next page
A to J | K to 0 | P to Q | R to Z | Home Page | Safety Info | Back | CD-ROM 

Parts Suppliers and Manufacturer Contacts

phone You can contact these parts suppliers and microwave oven equipment manufacturers directly for replacement parts, product literature, dealer locations, technical assistance, etc. Please e-mail additions or corrections to: j.gallawa@cox.net

Selection Keypad Microtech Home Page Important Safety Information Samsung through Whirlpool Panasonic through Quasar Kenmore through Montgomery Wards Amana through JCPenney Glossary Glossary of Electronic and Microwave Oven Related Terms
Repair TipSubmit your own repair tip j.gallawa@cox.net 
Learn how to do specific repairs on all brands of commercial and microwave ovens If you would like to learn more about repairing microwave ovens and become part of a multi-million dollar service industry, we invite you to take a look at Microtech's powerful new CD-ROM. You'll discover a virtual goldmine of trade secrets and have practical, illustrated step-by-step instructions on troubleshooting and servicing every microwave oven component. 
Click here for FREE samples of this CDROMTHE COMPLETE MICROWAVE OVEN SERVICE HANDBOOK on CD-ROM 2012
Operation, Maintenance, Troubleshooting and Repair
J. Carlton Gallawa

© 1998-2013 J. Carlton Gallawa . All Rights Reserved Worldwide
You are visitor number