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Intermittant loud "pop" when starting my microwave

Every once in awhile, when I push the start button on my microwave, it makes a loud pop, or snap sound. It sounds like an electrical short. It's loud enough to get the attention of everyone in the room (my poor nanny usually cries). This will occur once about every 20 to 30 times I use the microwave. This is the only symptom. I never smell any smoke, never see any external flashes or smoke, and the food always cooks normally.

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  • Anonymous Mar 14, 2014

    Loud popping sound when microwave is started

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  • GE Master
  • 19,396 Answers

Clean well the inside of the oven, if you keep having the problem and the inside is clean, then the magnetron is starting to go.

Posted on Jan 28, 2009

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Microwave made loud pop when started


It does sound like it may be arcing causing snapping sounds, if bare metal is exposed it will arc and eventually cause the maghetron to fail. It is possible the magnetron is breaking down, but for safety issues it should be checked.

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That sounds like maybe a high voltage wire or component is running too close to the chassis or one of the components connected to it.

Gruesome as it sounds, sometimes a pest can get inside the works and can move wires around or be killed, then its carcass can conduct electricity and cause arcing.

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To find helpful exploded view diagrams and get part numbers, you can just enter your full model number (66562619200) at the Sears parts site.

Here are some links you or someone you know can use (in order given) for test help, but

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

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

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