Question about Jenn-Air JMC7000 Microwave Oven

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Makes load noise and wont heat anything

Out of the blue my microwave started to make a loud noise when you press start and it wont heat anything

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  • csbuceo Feb 21, 2009

    I replaced the diode but it won't metal butter. Lights are on, table moves, fan is working, and the display is working.

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  • Jenn-Air Master
  • 9,030 Answers

I would first suspect a shorted high voltage rectifier diode or possibly a defective magnetron.

If the noise is just a loud buzz, I would suspect the diode. If it has more of a hollow sound - like someone gurgling into a coffee cup - then I would suspect the magnetron.

Here are some links you or a friend can use for test help, but PLEASE read their safety warnings first:

http://www.gallawa.com/microtech/diode.html
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: http://tinyurl.com/gv383

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

Posted on Mar 04, 2008

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