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Posted on Nov 28, 2009
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Doesn't heat food, and sounds much louder than normal. Any suggestions?

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William Miller

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  • GE Master 9,179 Answers
  • Posted on Nov 29, 2009
William Miller
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We have a sound clip here of what a microwave should sound like when the cooling fan and high voltage section are working.

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!)

You can find links to helpful exploded view diagrams and part ordering help here.

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

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When you try to microwave are the inside light, internal cooling fan and turntable all working?

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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.

We have a sound clip of what a microwave should sound like when the cooling fan and high voltage section are working.

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