Question about Jenn-Air JMC7000 Microwave Oven

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How do I fix a Jenn-Air JMC7000 that does not heat up items?

How do I fix a microwave that does not heat up items?
The microwave makes a loud buzzing noise and does not heat the item up. There is an odor when it is running. The ordor is like you smell when a electical appliance burns out. The control panel, lights, and turn table are working.

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  • Anonymous Mar 29, 2014

    Burnt rolls to black burned morsel - cannot clear the burnt odor from microwave.......help

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The noise is coming from the high-voltage transformer being overloaded by something shorting it out. Either the magnatron or the high-voltage capacitor and diode. Replace the capacitor and diode then if still not working, replace the magnatron. Its only affordable if you do it yourself - buy the part on EBAY - lookup "universal magnatron"
Hope ya fix it!

Posted on Jan 06, 2008

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Posted on Jan 02, 2017

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when a microwave quits heating but every thing else is ok normally
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Investigate these three areas if your microwave won't heat but you hear a loud buzzing or humming noise:
microwave_diode.jpg Power Diode

A diode is an electronic component that readily passes current in one direction only and blocks the flow of current in the opposing direction. If your microwave's diode has become defective, your microwave will not heat and you will hear a buzzing noise. Test the diode to determine if this is the cause of your problem. Replace it if it is defective.

picturena.gif High Voltage Capacitor

A capacitor is an electrical device which stores electricity. A defective capacitor may be why your microwave is not heating but you are hearing a buzzing or humming noise. The capacitor will have to be tested to determine if this is the cause of your problem. A defective capacitor will have to be replaced before your microwave will work again. Make sure you discharge the capacitor before you test it, though.

microwave_magnetron.jpg Magnetron

A defective magnetron is the third possible cause of why your microwave is not heating, but you can hear a buzzing noise. Test your microwave's magnetron. Replace it if it is defective.

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Hope Ya Fix it

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