Question about Kenmore 63993 Microwave Oven

1 Answer

Magic chef almost new everything works but no heat

Just over one year old over the stove type stopped heating, I read here that it was the fuse so i looked for the location of the fuse found it and ordered one on line , it took weeks i finally got the fuse a 20 amp and replaced it but the problem persists. I read somewhere that it may be a different type of fuse not the tube looking one easy to find, like a sensor or a thermostat? everything inside looks like new so maybe someone can guide me? I truly appreicate it would be a shame to dispose of an almost new one and I know that calling a service man is just about the oost of a new one

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  • dolcevittta2 Jan 01, 2009

    this is a clarification not a solution although I am asked to check if its a solution or I have the same problem , its neither. I just want to respond and say that the model number is MCO 153 UBF , that there is a louder deep humming noise than usual, there is one llight on and turntable works, I am not sure it there were supposed to be two lights.



    Thank you

  • William Miller
    William Miller May 11, 2010

    If the fuse were bad, it would be dead - no lights, no beeps, no signs of life.

    Magic Chef may cover it under warranty.
    I'd suggest contacting the manufacturer to get it fixed free.


    For Magic Chef
    in Canada call 866.587.2002.

    If they don't cover it, the magnetron should still be covered for 5-9 years.

    When you hit Start to
    cook, do the inside light and turntable come on?




    Any unusual noises? Is
    it louder or quieter than usual?




    What is the model number?



    These answers will help
    me judge whether it's in the high voltage
    section (magnetron, transformer, or diode) or the control section
    (door switch or control board relay or connection).







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  • Kenmore Master
  • 8,820 Answers

Thanks for the additional information. That did it.

With the symptoms you have, I would most strongly suspect a shorted high voltage rectifier diode or a bad magnetron.

The diode is a fairly cheap fix, and the mag will cost more.

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.

At our Web site, we have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes.

Here are some links you or someone you know can use for test help, but read their safety warnings first:

http://www.gallawa.com/microtech/diode.html
(if it's not shorted or burned, it's probably okay)

http://www.gallawa.com/microtech/mag_test.html

You can find Magic Chef parts here.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.


Posted on Jan 03, 2009

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