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My microwave suddenly stopped heating anything, kenmore 721.62629200

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If you hear an unusual buzzing noise, the magnetron (the component that actually generates the microwaves) or other electronic module may be broken. This is not easily fixed; contact a service technician.

If there is no noise at all the fuse may need to be replaced.

UNPLUG YOUR MICROWAVE BEFORE WORKING ON IT...

Read the owners manual to locate the fuse, remove it and take it to a parts supply store. Let the technicians test the fuse for you. If ti is bad, they can give you a new fuse to install. If it is not the fuse, they can recommend a reputable repairman to service your microwave.

Posted on Feb 05, 2010

Testimonial: "there is that buzzing noise, you hit right on the nose, thank you!!"

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1 Answer

My Kenmore Microwave, only a couple of years old, suddenly stopped heating. Everything else works fine. Model # 721.63242300


Hello,

read the info on the below link, it was posted by me;

http://www.fixya.com/support/r7088553-microwave_oven_not_heat_hear_loud

Good luck.

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Our kenmore microwave stop heating.. Everything works well but it just stop heating last night after l cleaned it.. did I do anything to it??


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Microwave stopped heating


I had the same oven for one and a half years and had the same problem. Had the sears repairman come out and he said the magnetron burned out and needed replacing for $285. It was never under warranty with the warranty that came with oven. I couldn't believe it! We had an independent repairman look at it and he found a design flaw that causes the magnetron to blow. If you replace the matnetron (megnatron?) it will work for awhile, maybe, but then just need to be replaced again. It's cheaper to buy a new microwave. In fact, I got out our old microwave that's over 20 yrs. old and still works--just isn't as fast and as new ovens. Good luck!

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I just had the exact same problem. :( Did you find anything out?

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Turn on the microwave, it runs but doesn't heat anything.


It's probably one of the switches that cuts the power to the microwave when you open the door. Mine is GE 700 watts and has 3 of those, and the one in the middle went bad so a week ago I temporarily bypassed the switch (while I get one) by cutting both wires that go to the switch and put electrical tape at the end of each wire. The switch was supposed to be a normally open switch but it had continuity with the door open or closed, and it should only have continuity (be closed) when the door is open.

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Microwave suddenly stopped working


Code F3 indicates an open / defective thermistor / temperature sensor. The first suspects when a microwave is not heating would be the door switches, bad connections on the magnetron terminal or bad connections on the control board. 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

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