Question about Microwave Ovens

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OLD Kenmore Microwave Oven

It just stopped working and before I write it off, I was wondering if there is anything I can check. I hate to get rid of it because it is BIG and POWERFUL (1400W). I already tried the fusebox and a different outlet.

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  • Anonymous Dec 05, 2007

    thermador double wall oven-microwave stopped working

  • BbRrYyAaNn Dec 08, 2007

    That was very informational...Thank you. I guess we have opted to buy a new microwave, esp. since I saw that it was purchased in 1982!! My parents always took excellent care of their appliances. It was running for about 3 minutes and somewhere along the line, it just went dead. I heard it stop without the audible tone so I knew something was wrong. I have to imagine that newer models are more efficient anyway.

    Regards, BRYAN



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I have an old but perfectly good operating kenmore under cabinet micro model 228.7374 purchased 12/24/86 from sears. it has feature five on the door,the keypad has preheat, bake time,toast, oven temp, combo time, broil time, micro time, & the #'s 1thru 10 , micro power, clear, start, stop, time , solid state. the kenmore book that came w/ it pictures does not match the micro keypad. today's menu's also call for med heat. can someone tell me how to get med & lo heat settings? thanks

Posted on May 18, 2008

  • jdcj May 19, 2008

    help please


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A microwave can be dead for many reasons.

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.

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

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

If you or a friend 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:
You can probably find an exploded view by entering your FULL model number here: (the 3 is correct)

Posted on Dec 05, 2007

  • William Miller
    William Miller Dec 08, 2007


    While the info above may apply, you might get better results if you post this in the Thermador area, under your model number if available, and please include your model number in the post.



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