Question about Kenmore Microwave Ovens

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Just stop working

I have a Kenmore spacemaster microwave model # 72189941490 serial # 50600926. I was cooking some oat meal and it just stopped like it lost electricity. I checked the plug in and it works fine yet nothing on the microwave works...no light, nothing. Is there a fuse that may have blown on the microwave?
thanks
Kathy

Posted by on

  • hatmakerx2 Jun 17, 2008

    I too have the same problem with same make and model. No power, have checked to make sure I hadnt tripped a breaker but I see where you mentioned a fuse.....can you tell me where thats located? Theres no power or anything, so aggravating!!!! I dont have the money to just go out and buy a new one right now, but I need my microwave,lol help!

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  • Kenmore Master
  • 9,098 Answers

A microwave can be dead for many reasons.

If the fuse is good, it may be an open thermostat or thermal cutout (TCO) / thermal fuse on or near the magnetron or on top of the cavity / body of the oven.

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.

When checking thermostats, if it has a hood fan thermostat, that should read open, as opposed to the others, which should read closed.

If it went dead almost immediately after pressing the Start pad, that's usually a shorted high-voltage capacitor.

If it went dead a few seconds after pressing the Start pad, that's usually a failing high-voltage transformer.

If it goes dead or blows the breaker when you plug it in or open or close the door, then there's a problem with a door switch or door switch mount.

If it's intermittent or random, it may be a bad connection, usually on the control board or a loose fuse holder, or even an intermittent fuse.

You should do a continuity test on the fuse while it's in the holder (with the microwave unplugged, of course) then turn the fuse by hand or take it out and put it back in, then test it again.

If you remove the fuse, then press the meter leads against the ends, it can allow internal contact to be made and make a bad fuse appear to be good.

If you or someone you know decide to look into it, we have critical safety information and disassembly information at our site, and our link is at our listing here on FixYa: http://tinyurl.com/yzjozk

You can probably find an exploded view by entering your FULL model number here: http://www.searspartsdirect.com

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

Posted on Jun 08, 2008

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