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Kenmore microwave loud popping noise when start

Kenmore Microwave (February 2004 Model No. 66562619200). It makes loud popping noise (like a rifle shot) when you press the start button. It has done this occasionally for the past couple of years. Recently, it has started popping most of the time when the start button is pressed, whether on full power or on reheat power.

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  • Whirlpool Master
  • 9,085 Answers

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.

It may instead be a failing high voltage diode.

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

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

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

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

Posted on Jun 16, 2009

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