Question about GE Spacemaker JVM1640SJ Microwave Oven

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I have a GE Spacemaker Model JVM16400BB004 over the counter microwave, that was working fine last night turn it on this morning and it lights up and the turnatable goes around and sounds just like it use to for about 2-3 seconds they it gets a louder humming noise and it does not heat up the food. Is this a problem I could fix, I'am somewhat knowledgable, but never worked on a microwave or should I just buy a new one. Hate to throw it away as it looks brand new.

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A loud buzz, hum, or groan is usually a shorted high voltage rectifier diode, but a sound like gurgling into an empty coffee mug is one symptom of a failed magnetron, and yet the mag can be bad without that sound.

Here are some links you or someone you know can use (in order given) for test help, but read the safety warnings first:

http://www.gallawa.com/microtech/diode.html
(if it is NOT shorted or burned looking, it's probably fine)


http://www.gallawa.com/microtech/mag_test.html
(continuity can be good even though mag is bad!)


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

You can find helpful exploded view diagrams and order parts by entering your full model number from the tag on the oven here.

If you prefer to arrange service by an authorized service center, GE Customer Service is here.

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

Posted on Aug 23, 2010

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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.

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