Question about Microwave Ovens

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Microwave not operating correctly.

Report abuse posted by podolskifami on Dec 14, 2008
Recently I noticed that the microwave sounded like it was only operating on half power. In other words, the microwave sounded a little quieter than usual and it appeared to be operating slowly. Upon using the microwave a few more times, the power completely shut off. The power has since returned and I have normal use of the clock, lights and exhaust fan, however, I have the same "half power" problem. Any suggestions and can I fix this problem myself? Please respond to my company email at jeff@jbcpropertymanagement.com

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  • Microwave Ovens Master
  • 9,098 Answers

It sounds like your internal cooling fan (not to be confused with the exhaust fan) is not working.

This will cause the magnetron to overheat until the magnetron's thermostat trips, killing power to the whole oven until it cools back down.

To help further, I would need the full model number form the tag on the oven.

For more free DIY and other help & advice, feel free to contact me.

William E. Miller, AS-EET
pupista@gmail.com
http://www.microwavecontrol.com
Microwave Oven Control Panel Repair Nationwide
"Recycling by repairing since 1982"

Posted on Mar 16, 2017

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
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Posted on Jan 02, 2017

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MicrowaveSvc
  • 9098 Answers

SOURCE: Microwave quit

I would suspect either door switches or an intermittent control circuit board, either of which can be repaired. Opening the door while cooking (without first hitting the STOP pad) is the primary cause of door switch failure over time. I have a text file on my site called "doorsw.txt" which helps in diagnosing and repairing door switch problems. You can find the file via a Google search. It will help you check and replace the door switches if you or an able friend is so inclined. In some cases, the problem is a bad connection or a bad relay on the control board. That's something we see fairly often, and we repair them for only $32.50 nationwide.

Posted on Oct 12, 2006

MicrowaveSvc
  • 9098 Answers

SOURCE: Microwave Oven Problem

Quite often this is due to a bad door switch. Opening the door while cooking (without first hitting the STOP pad) is the primary cause of door switch failure. It's probably not actually heating with the door open, but better safe than sorry! If you or a friend decide to work on it, we have *critical* safety, disassembly, and troubleshooting info (as well as a text file which helps in diagnosing and repairing door switch problems) at our site, which is linked at our listing here on FixYa: http://tinyurl.com/yzjozk You can find helpful exploded view diagrams and order parts by entering your full model number (without the suffix) here: http://tinyurl.com/gv383

Posted on Apr 10, 2007

  • 209 Answers

SOURCE: Microwave malfunction

this could be a diode between the capacitor and magnetron, (its like a fuse) i do not recommend self repair, but give you this info as a guide to what maybe wrong, microwaves contain high voltage and care should be used if you do attempt repair hope i have helped a little

Posted on Oct 04, 2007

MicrowaveSvc
  • 9098 Answers

SOURCE: Kenmore Microwave Model 721.80593402

This is usually a broken or misaligned door switch mount or possibly a bad door switch.

If you or a friend decide to look into it, we have critical safety information, info on door switch diagnosis and replacement, and
disassembly information at our site, linked here on Fixya: http://tinyurl.com/yzjozk

You can find an exploded view by entering your model number here: http://www3.sears.com

Posted on Nov 18, 2007

SOURCE: microwave starts as normal but cuts out after

This is happening due to either the magnetron, or the Power Diode, or both, is breaking down, under load, then the unit detects the fault condition, & then, for safety reasons, to avoid a fire or explosion, shuts down the system. You need to take it in to be looked at please obtain a "Quote" before proceeding with any work. This way you can decide to repair or replace.

Posted on Mar 24, 2010

Testimonial: "Excellent. Thanks so much for your very quick and valued help! Will do as you suggest and give further feed back on outcome. Again, Many Thanks. "

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