Question about AEG Microwave Ovens

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We have a competence B6100-1. A while back the buttons on the control started working erratically, to the point where now if they work at all, then they have to be pressed many times before any reaction from them. An AEG service engineered came to look at it, and said that although the problem is with the contacts between the buttons and the circuit board, on this model a whole new circuit board has to be ordered, as it is not possible to get the parts separately. Asked how much this might be, he said about EUR 400-500! Can that really be, that the cost of a new circuit board is almost as much as the oven itself?

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

MicrowaveSvc
  • 9047 Answers

SOURCE: JVM1320WB001 1000W

The problem is damage to the control circuit board. This damage is usually caused by removing or installing light bulbs without disconnecting the oven from the power line first. We regularly repair these GE / Samsung smart boards for this problem for customers from across the country for $32.50. We have an important file called "safety.txt" which you can find by doing a search for "microwave safety.txt" on Yahoo.com. It's important information to consider before proceeding. When the varistor fails, it will be shorted. That will cause the whole oven to be "dead". It's almost certainly fine.

Posted on Nov 02, 2006

MicrowaveSvc
  • 9047 Answers

SOURCE: Microwave oven turns off

It could be an overheating magnetron. There is a thermostat inside (mounted to the side of the magnetron) which senses excessive heat and opens up, disconnecting the power to the oven. If that's the case, unplugging it and plugging it back in will not fix it. It will come back on by itself after it cools down. That's another indication that it might be a thermostat kicking out. You might try to further characterize the failure: - happens only when cooking on full power? - also happens when cooking on a low power level? - shuts down every time you use it? - only shuts down after XX amount of time cooking? Once you characterize it more, I can make further suggestions. It may also be a bad connection on the control panel.

Posted on Nov 05, 2006

MicrowaveSvc
  • 9047 Answers

SOURCE: GE JES1456WFC001 microwave oven turns on by itself

You are correct. The keypad is failing.

If you might want to replace it yourself, I have uploaded a handy guide with pictures showing you what's typically involved.

If you would like to have us do this for you, we do that for $39.95 plus part costs, assuming we can get the part for this Canadian model.

We're happy to help and we appreciate your thoughtful rating of our answer.

William E. Miller, AS-EET
prototech@usa.net
http://www.microwavedisplay.com

Posted on Jun 29, 2008

MicrowaveSvc
  • 9047 Answers

SOURCE: Control Panel of Maytag Microwave CMV 1000B doesn't work

You have a failed membrane keypad.

If you (or someone you know) might want to replace it yourself, I have uploaded a handy guide with pictures showing you what's typically involved.

You can usually find helpful exploded view diagrams and order parts by entering your full model number here.

There should also be a "mini-manual" hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting & testing.

If you would like to have us do this repair for you, we do that for $39.95 plus part costs.

At our Web site, we have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes.

Feel free to contact me directly (and please remind me of your model number) for more information & help.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

William E. Miller, AS-EET
prototech@usa.net
http://www.microwavedisplay.com

Posted on Jan 01, 2009

MicrowaveSvc
  • 9047 Answers

SOURCE: GE spacemaker XL1400, Model number JVM1430WA 001

OOPS!

I meant to post that as a solution, not a clarification request, so it came out as one big blob paragraph (Thanks, FiyXa!)

Here it is again, but in readable form:


You have a failing membrane keypad.

If you (or someone you know) might want to replace it yourself, I have uploaded a handy guide with pictures showing you what's typically involved.

It is part number WB27X10171 and while GE sells it for a whopping $115.50, you can get it for $90.58 here.

You can also find helpful exploded view diagrams via that link.

There should be a "mini-manual" (tech sheet) hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting, testing, and locating components.

dee77f7.jpg

At our Web site, we have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes.

If you would like to have us do this repair for you, we do that for $39.95 plus part costs, in this case
$90.58 plus $8.95 shipping for a total of $139.48.

Feel free to contact me directly (and please remind me of your full model number from the tag on the unit) for more information & help.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

William E. Miller, AS-EET
prototech@usa.net
http://www.microwavedisplay.com
Microwave Oven Control Panel Repair Nationwide

Posted on Jul 25, 2009

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I have a sumsung SMH9151s microwave that recently started having problems. Now it keeps beeping and in the display its going back and forth to the letter L and back to 0. I tried unplugging it and plugging...


Make sure that the program controller is working if not check power - step down supply, the pads are responding- if not faulty pads- or the door switches, if the switch contact are not good then it will not trigger the processor to switch on the waveguides. If the lights or fan work without any display or action of program being triggered to start then it can be a possible fault on the main board or the processor. Sometimes insect secretion can short the board and display panel and so the processor can work in such an erratic manner. If so clean, solder and reset the board. Now identify the parts by clicking this link: http://www.espares.co.uk/advice/microwave/a/5/141/identifying-microwave-parts.html

Jan 11, 2013 | Samsung SMH9151 Microwave Oven

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Troubleshooting Guide


  • Problem: Totally dead oven.
    Possible causes:
    1. No power to outlet (blown fuse or tripped breaker or GFCI).
    2. Blown main fuse - likely due to other problems.
    3. Open thermal protector or thermal fuse.
    4. Defective controller or its power supply.
    5. Clock needs to be set before other functions will operate (some models).

  • Problem: Totally dead oven after repair.
    Possible causes:
    1. Cabinet screws replaced in incorrect location (safety interlock not engaged).
    2. Any number of screwups. :)

  • Problem: No response to any buttons on touchpad.
    Possible causes:
    1. Door is not closed (some models).
    2. You waited to long (open and close door to wake it up).
    3. Controller is confused (pull plug for a minute or two to reset).
    4. Defective interlock switches.
    5. Faulty controller or its power supply.
    6. Touchpad or controller board contaminated by overenthusiastic cleaning.
    7. Defective/damaged touchpad.

  • Problem: Oven runs when door is still open.
    Possible causes:
    1. Damaged interlock assembly.
    2. Cooling fans (only) running due to bad sensor or still warm.

  • Problem: Oven starts on its own as soon as door is closed.
    Possible causes:
    1. Defective triac or relay.
    2. Controller is confused (pull plug for a minute or two to reset).
    3. Defective controller or its power supply.
    4. Touchpad or controller board contaminated by overenthusiastic cleaning.
    5. Defective/damaged touchpad.

  • Problem: Oven works but display is blank.
    Possible causes:
    1. Defective controller or its power supply.
    2. Broken display panel.
    3. Oven needs to be reset (pull plug for a minute or two to reset).

  • Problem: Whacked out controller or incorrect operation.
    Possible causes:
    1. Previous or multipart cook cycle not complete.
    2. Controller is confused (pull plug for a minute or two to reset).
    3. Defective controller or its power supply.
    4. Touchpad or controller board contaminated by overenthusiastic cleaning.
    5. Defective/damaged touchpad.
    6. Defective sensor (particulalry covection/mirowave combos).

  • Problem: Erratic behavior.
    Possible causes:
    1. Previous or multipart cook cycle not complete.
    2. Bad connections in controller or microwave generator.
    3. Faulty relay - primary (or HV side, much less commonly used).
    4. Defective controller or its power supply.
    5. Bad contacts/connections on mechanical timers. Intermittent fuse.
    6. Power surge at start of cook cycle confusing controller.
    7. Microwave (RF) leakage into electronics bay.

  • Problem: Some keys on the touchpad do not function or perform the wrong action.
    Possible causes:
    1. Touchpad or controller board contaminated by overenthusiastic cleaning.
    2. Defective/damaged touchpad.
    3. Controller is confused (pull plug for a minute or two to reset).
    4. Faulty controller.

  • Problem: Microwave oven does not respond to START button.
    Possible causes:
    1. Defective START button.
    2. Faulty interlock switches.
    3. Door is not securely closed.
    4. Faulty controller.
    5. You waited too long - open and close door to wake it up!

  • Problem: No heat but otherwise normal operation.
    Possible causes:
    1. Blown fuse in HV transformer primary circuit or HV fuse (if used).
    2. Bad connections (particularly to magnetron filament).
    3. Open thermal protector or thermal fuse.
    4. Open HV capacitor, HV diode, HV transformer, or magnetron filament.
    5. Shorted HV diode, HV capacitor (will blow a fuse), or magnetron.
    6. Defective HV relay (not commonly used).

  • Problem: Timer and light work but no heat, cooling fan, or turntable rotation.
    Possible causes:
    1. Defective (lower) door interlock switch or door not closing fully.
    2. Faulty relay or triac.

  • Problem: Fuse blows when closing or opening door:
    Possible causes:
    1. Defective door interlock switch(s).
    2. Interlock switch knocked out of position.
    3. Misaligned door.

  • Problem: Loud hum and/or burning smell when attempting to cook.
    Possible causes:
    1. Shorted HV diode, magnetron.
    2. Burnt carbonized food in or above oven chamber.
    3. Shorted winding in HV transformer.
    4. Frayed insulation on HV wiring.

  • Problem: Arcing in or above oven chamber.
    Possible causes:
    1. Burnt carbonized food deposits.
    2. Exposed sharp metal edges.

  • Problem: Fuse blows when initiating cook cycle.
    Possible causes:
    1. Defective interlock switches or misaligned door.
    2. Shorted HV capacitor.
    3. Shorted HV diode.
    4. Shorted magnetron (probably won't blow main fuse but HV fuse if used).
    5. Defective triac.
    6. Old age or power surges.
    7. Defective HV transformer.
    8. Short in wiring due to vibration or poor manufacturing.

  • Problem: Fuse blows when microwave shuts off (during or at end of cook cycle).
    Possible causes:
    1. Defective triac (doesn't turn off properly).
    2. Defective relay.
    3. Shorting wires.

  • Problem: Oven heats on high setting regardless of power setting.
    Possible causes:
    1. Faulty primary relay or triac or HV relay (not commonly used).
    2. Faulty controller.

  • Problem: Oven immediately starts to cook when door is closed.
    Possible causes:
    1. Shorted relay or triac.
    2. Faulty controller.

  • Problem: Oven heats but power seems low or erratic.
    Possible causes:
    1. Low line voltage.
    2. Magnetron with low emission.
    3. Faulty controller or set for wrong mode.
    4. Stirrer (or turntable) not working.
    5. Intermittent connections to magnetron filament or elsewhere.
    6. Faulty primary relay or triac or HV relay (not commonly used).

  • Problem: Oven heats but shuts off randomly.
    Possible causes:
    1. Overheating due to blocked air vents or inoperative cooling fan.
    2. Overheating due to bad magnetron.
    3. Bad connections in controller or microwave generator.
    4. Faulty interlock switch or marginal door alignment.
    5. Faulty controller.
    6. Overheating due to extremely high line voltage.
    7. Stuck stirrer fan resulting hot spots detected by sensors.

  • Problem: Oven makes (possibly erratic) buzzing noise when heating.
    Possible causes:
    1. Fan blades hitting support or shroud.
    2. Vibrating sheet metal.
    3. Vibrating transformer laminations.
    4. Turntable or stirrer hitting some debris.

  • Problem: Oven light does not work.
    Possible causes:
    1. Burnt out bulb :-).
    2. Bad connections.

  • Problem: Fans or turntables that do not work.
    Possible causes:
    1. Gummed up lubrication or bad motor bearing(s).
    2. Loose or broken belt.
    3. Bad motor.
    4. Bad thermostat.
    5. Bad connections.

on Mar 30, 2008 | Kenmore 80412 Microwave Oven

1 Answer

RV Panasonic Microwave cycling


The problem is in the keypad control board, eventually it will need to be replaced, also there may be a intermittent short in the keypad membrane this is where a professional will be needed to make that determination.

Jun 11, 2012 | Panasonic Microwave Ovens

1 Answer

My daughter put a metal ring in the microwave to heat up. I was not there, so I did not know what happen and if sparks flared up. But the microwave kept working OK for half a day before acting crazy. ...


There really shouldn't be a correlation between the metal ring in the oven cavity and the erratic operation of the control board. Although it might seem suspicious, what happens inside the oven cavity stays in the oven cavity.

Jun 20, 2010 | General Electric Microwave Oven

1 Answer

Start button not working


We had this problem and a repairman came and replaced the entire control/display panel. Still had the problem some time after he left. I found that there are several ribbon cables in the back that plug in to the circuit board in the back of the control/display panel. There is a wide ribbon that is close to right rear burner control button, (but on the back side). The connector for this ribbon cable is the trouble. If you unsnap the connector by gently pulling out on it, it will release the ribbon cable - which you then pull out and push back in. Snap the connector back and you might be good to go for awhile. At some point, it will do it again. So, I've loosened the back sheet metal so I can reach over the back - without having to pull the oven away from the wall. I feel, with my finger tips, the wide ribbon cable, (roughly behind the right rear burner button), and press on the right side of the connector after setting the temperature. This, temporarily, enables the Start button. This works for only one time. To make it work for about a month, you have to unsnap, pull out and push back in as described above. I'll do this again when I get tired of my wife calling me to the kitchen to start the oven.
I assume the new parts will have the same problem as the original.
What a pity.

Dec 29, 2009 | LG Microwave Ovens

1 Answer

Oven resets (like power failure) frequently - either while pressing buttons or while cooking food. Approx 5 yrs old - problem just started.


Hi.


The following parts may cause this problem and must be tested:

Control Pad: This is most likely the problem , testing the contol pad is quite complicate.

Door lock: A defective door lock can cause the magnetron and turntable motor being turn off erratically. This wont cause the program to reset.

Power cord and power connection solder joints: this can cause a microwave restarting because vibration caused by the oven working cause power interruption.

A bad shielding to controller board can also cause the microwave resetting because of the interference caused by magnetron on control board circuits. This is also quite common.

The control pad or control board are the parts that are most commonly causing this problem.

Dec 14, 2009 | GE Spacemaker JVM1640SJ Microwave Oven

1 Answer

Whirlpool gold series model gh7155xhs-1 buttons not functioning


Remove power to unit, wait 3 min. Plug unit back again try using touch control, If it still not working replace controller assembly, touch pad and board.

Sep 17, 2009 | Whirlpool GH7155XHS Microwave Oven

1 Answer

Tappan microwave


I think the membrane/button for the number 4 is stuck or broken. Due to the nature of a microwave my advice would be to entrust the work to a competant technician. Hope this helps.

Oct 01, 2008 | Tappan Microwave Ovens

2 Answers

Erratic keypad


It must be dissassembed Clean both surfaces (pad bottom surface and board up surface so they would have good contact) with alcohol solution liquid sweep and let them be dry. Next assemble it again and test it. if START KEY persit not working even if it is clean, a small leaf of aluminium must be stuck at the pad bottom of START KEY. Be sure you can carry out this procedure well done otherwise you 'll need to buy another keypad. Good Luck!

Jan 05, 2008 | Kenmore 63672 Convection/Microwave Oven

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