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Ks Wilson
Ks Wilson Posted on Dec 05, 2015
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The magnetron fan will not turn off after a power outage.

Power outage occurred and when power came back on, the magnetron fan on the right interior keeps clicking and making a noise like it is trying to turn on.

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3 Related Answers

Anonymous

  • 173 Answers
  • Posted on Aug 17, 2007

SOURCE: Fan

spikes in line after power out can damage wierd parts...the microprocessor tells the fan to turn on when start is pressed...it sends a positive voltage to a transitor which saturates acting like a switch,,,I bet this transitor is shorted. good luck

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Anonymous

  • 572 Answers
  • Posted on Feb 11, 2010

SOURCE: will not operate circuts are okay and power cord

ur fuse blew behind panel

raj somaiya

  • 5370 Answers
  • Posted on Feb 05, 2011

SOURCE: The display is flickering and

The timer control board is getting short.There are many tiny electrical components on this board.Due to power surge ,one of the component or may be few more components got shorted and this is casing the control panel to flicker.the control board needs to be checked and this faulty component has to be checked and replaced. In some cases the board gets shorted out,if this happens.------------there is online site dealing with this flickering display.They inspect the board and replace the faulty component on the board,and make the same board working for you.In in case board repairing is not possible then you will have to get the control board replaced.-----------Click this link directly for online repair center of flickering display repairs:--- http://031d26d.namesecurehost.com/mwd/index.htm -------------------- If in case the board is not repairable then for getting new board.

You can get required parts from sears part direct online site or from repairclinic.com site.

--------

This will help. Thanks. Helpmech.

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Related Questions:

0helpful
1answer

My under cabinet microwave is not working correctly.
The possible reasons are: 1) The high voltage transformer is broken, 2) The magnetron is broken.

For the 1st problem, no power can be applied to the turntable.
For the 2nd problem, the magnetron is broken with no microwave can be issued.
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Jul 14, 2015 • GE Microwave Ovens
0helpful
1answer

Microwave would cut off after a few minutes and then turn back on but now there is no power at all.
There are few reasons for this fault, but the main is that you need to open your microwave oven and first check the Fan which is connected at the back which cools the magnetron.
If this fan fails thus results in magnetron being overheated and the thermal cutoff gets open circiut and shuts down whole power of your microwave oven.
Check your fan motor test it straight with direct power
Also check the thermal cutoff.

Let me know after you have done those checkups



Regards
Ashwin
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May 22, 2015 • Magic Chef MCD1611ST Microwave Oven
1helpful
1answer

No power dead
power outages cause power surges and will damage electronic control boards. I suggest replacing the Control board and checking the interlocking door switches. Whilst inside the microwave check the magnetron for discoloration around the magnetron horn or gun as it were. If it don't look clean and new, otherwise burnt it's bad !
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Feb 06, 2014 • Sharp Microwave Ovens
0helpful
1answer

I have a over the range mw, the controls work but the fan,light and microwave itself has no power.
If still under warranty--take it back--serious problem. If not a qualified person will have to check the door switch & interior electronics. There is a faint chance that a wire may not be connected inside. If it is over 3 yrs. old --have magnetron tube checked also.
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Feb 07, 2011 • Roper MHE13XH Microwave Oven
2helpful
1answer

My Kenmore Elite electric stove top will turn on fine, but it will randomly cut off. Then none of the burners will heat up, but lights are on like all is fine. If I turn off the power for 5 minutes it...
If it goes dead for a while during or after cooking then comes back on, the magnetron is probably overheating and causing the magnetron thermostat to open.

Then when it cools, it closes the circuit and allows power through again.

An overheating magnetron can be :
  • operating oven without cover(s) in place
  • wrong magnetron installed in oven
  • an old or otherwise failing magnetron
  • cracked magnetron magnet
  • improper power line voltage (US homes should be 110-125VAC)
  • foods low in moisture (popcorn & bacon, e.g. - add 1/2 cup of water in rear oven)
  • failed or inoperable cooling fan or hood vent exhaust fan
  • deteriorating foam weatherstripping seals in air ducts or on outside cover
  • blocked air vents (dust, animal nest debris, insufficient free air space behind & around oven, etc.)
  • clogged or greasy charcoal filter or grease filter
  • blocked duct in hood vent exhaust
I suspect a failure or the fan, clogged filter or bad magnetron.

I appreciate your thoughtful rating of my answer.
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Feb 07, 2011 • Microwave Ovens
0helpful
2answers

Oven suddenly lost heat, inside fuse is OK though. Display, fan, turntable all working. Is it magnetron or its power supply?
You're right, if the lights come on and turntable moves, it is most likely your magnetron.
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Jan 23, 2011 • Microwave Ovens
2helpful
1answer

Microwave work for 2 minut and turns off and after 5min its turns back on and do same thing
If it goes dead for a while during or after cooking then comes back on, the magnetron is probably overheating and causing the magnetron thermostat to open.

Then when it cools, it closes the circuit and allows power through again.

An overheating magnetron can be due to:
  • operating oven without cover(s) in place
  • wrong magnetron installed in oven
  • an old or otherwise failing magnetron
  • cracked magnetron magnet
  • improper power line voltage (US homes should be 110-125VAC)
  • foods low in moisture (popcorn & bacon, e.g. - add 1/2 cup of water in rear oven)
  • failed or inoperable cooling fan or hood vent exhaust fan
  • deteriorating foam weatherstripping seals in air ducts or on outside cover
  • blocked air vents (dust, animal nest debris, insufficient free air space behind & around oven, etc.)
  • clogged or greasy charcoal filter or grease filter
  • blocked duct in hood vent exhaust
I would suspect a failure or the fan, clogged filter or bad magnetron.

You didn't mention your brand or model number, so I'm limited to general advice.
You can find links to helpful exploded view diagrams and part ordering help here.

I recommend that you bookmark that link to your favorites.We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

William E. Miller, AS-EET
[email protected]
http://www.microwavedisplay.com
Microwave Oven Control Panel Repair Nationwide
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May 26, 2010 • Amana RFS12MPS Microwave Oven
2helpful
1answer

We have a model # mmv1153bas over the range microwave. When heating or cooking items longer than a couple minutes the unit shuts off and remains off for at least 1 hour. It is not the breaker or the plug...
If it goes dead for a while during or after cooking then comes back on, the magnetron is probably overheating and causing the magnetron thermostat to open.

Then when it cools, it closes the circuit and allows power through again.

An overheating magnetron can be due to:
  • operating oven without cover(s) in place
  • wrong magnetron installed in oven
  • an old or otherwise failing magnetron
  • cracked magnetron magnet
  • improper power line voltage (should be 110-125VAC)
  • foods low in moisture (popcorn & bacon, e.g. - add 1/2 cup of water in rear oven)
  • failed or inoperable cooling fan or hood vent exhaust fan
  • deteriorating foam weatherstripping seals in air ducts or on outside cover
  • blocked air vents (dust, animal nest debris, insufficient free air space behind & around oven, etc.)
  • clogged or greasy charcoal filter or grease filter
  • blocked duct in hood vent exhaust
We have a sound clip of what a microwave should sound like when the cooling fan and high voltage section are operating here.

It is vital that the cooling fan runs, or the magnetron will be destroyed. Repeated shutdowns like this are endangering the magnetron, assuming it's not bad already.

Your owner's manual will cover checking the filters and will cover warranty terms. The magnetron may still be covered.

If for some reason you don't have your manual, you can download it here.

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

William E. Miller
[email protected]
http://www.microwavedisplay.com
Read full answer
May 25, 2010 • Maytag UMV1152BAS Microwave Oven
1helpful
1answer

GE JVM130K004 space saver microwave not working
The magnetron is overheating, and the magnetron thermostat is tripping, interrupting power until it cools back down.

This is to protect the magnetron from being destroyed from overheating.

It may be that the internal cooling is not occurring or the magnetron is failing. Cooling can be compromised by:

- failed or failing internal cooling fan
- blocked air inlet or filter
- outer cover not installed correctly

There should 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.

 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.

You can find links to helpful exploded view diagrams and part ordering help here.

I'd recommend that your bookmark this link to your favorites.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.
Read full answer
Feb 09, 2010 • GE Microwave Ovens
1helpful
1answer

Microwave's Power goes off after 3 minutes running..
If the time from START to shut off were EXACTLY 3 minutes, then I would suspect a sensor problem or corrupted code in the microprocesor. But since that time sounds more random, it sounds heat-related, and I would suspect a failing magnetron or a failure in the cooling system. If the cooling fan is not running while the oven is cooking, this failure can occur, and can destroy the magnetron in short order. A cracked magnet (has the oven been dropped?) or other problem can cause a magnetron to go bad and overheat. If it's under warranty, I would definitely contact the manufacturer (see your manual) to find an authorized local servicer. If it's out of warranty, I would balance the cost of a new microwave versus a bench diagnosis fee of $25 or more or an in-shop repair cost of maybe $80 or more.
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Oct 15, 2006 • Westinghouse WST3504 Microwave Oven
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My under cabinet microwave is not working correctly.

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