Question about Microwave Ovens

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My built-in KitchenAid microwave/convection oven/oven fan comes on and goes off spontaneously. I have to turn it off at the breaker. Otherwisel, both micro/convection and the lower oven are functioning beautifully. Any ideas?

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  • merryhrt Dec 13, 2008

    I'd say it's the internal cooling fan. The green "on" light is also illuminated when the fan comes on, but the interior light is off and the turntable does not turn during this "phantom" operation. The model# is KEMS376TBL3, serial# XA0202483. It went about 24 hours operating just fine, then spontaneously came on again this afternoon so I had to throw the breaker to turn it off. Any ideas?

    Thanks so much.

  • brokenaid Dec 25, 2008

    Guess what, I think I have the same model oven and microwave.It's a #KEMS376. And we have been having this problem for  many years now and haven't looked into getting this fixed. 


    We end up flipping the breaker switch on and off each time we want to use it or the "fan" will turn on mysteriously, it has gotten worse over the years where it would turn on almost immediately after each microwave use. 


    Any easy fix?

  • William Miller
    William Miller May 11, 2010

    > The green "on" light is also illuminated when the fan comes on

    This seems like a good clue, but which light? Where is it?

    The manuals for your oven and for the microwave can be downloaded here if you don't have them.

    Sorry for the back and forth, but I'm pretty sure I can figure this out for you with just a little more info.

    Can you look at the manual and let me know which light that is and where it is, or upload a good digital photo?


  • William Miller
    William Miller May 11, 2010

    Do you know which fan it is coming on by itself?

    This should have three fans:

    1. an internal cooling fan that comes on automatically when you microwave

    2. A hood vent exhaust fan that you can turn on and off

    3. the convection fan that is only used when cooking in convection mode

    Also, please let us know your model model so we can help you best.


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I have the same problem
any hints to solve it.
It's a 1988 vintage oven/microwave so I can't complain but it 's a pain if
I have to replace the unit

Posted on Dec 21, 2010

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How did you fix this. Im having the same problem

Posted on Apr 16, 2012

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