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Roper microwave Microwave still has light working , fan working all outside numbers working, but will not heat up food

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  • she50 Oct 23, 2008

    HI, Everything works on it except it will it will not heat. The model number is Roper MHE14XMB-0 Serial number TRP4940262. Thank You, Sherrie

  • she50 Oct 24, 2008

    Yes the light comes on the turntable turns . It sounds like it always has , just does not heat up anything.

  • William Miller
    William Miller May 11, 2010

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

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



  • William Miller
    William Miller May 11, 2010

    When you hit Start to cook, does the turntable come on?

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

    Do you have 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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  • Specialty El... Master
  • 8,820 Answers

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.

There should also be a "mini-manual" hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting & testing.

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, it's probably okay)
http://www.gallawa.com/microtech/mag_test.html
http://www.gallawa.com/microtech/xformer.html

You can usually find helpful exploded view diagrams and order parts by entering your full model number here.

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

Posted on Oct 29, 2008

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