Question about Kenmore Microwave Ovens

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Lost heat on microwave ,everything else works fine simple fix?

Microwave was working fine then heard a loud pop and the heat is not coming on at all,everything else is fine is there an inexpensive fix that avg home owner can do,Kenmore unit model #72167600790 over the stove type approx 5-8 yrs old.

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  • Anonymous Mar 14, 2014

    Loud popping sound when started, everything else works fine

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Inexpensive fix yes, but quite dangerous as you have to either replace the High voltage Diode or the magnetron depending on what has gone. Most often it is the Diode as that is fed a few thousand volts and anomolies such as a surge in current cause it to blow(popping sound) You can also check the fuses and if lucky it is just a fuse, but a fuse very seldomly just blows as it points to an underlying fault such as magnetron , capacitor or Diode. Have a service man attend to it unless you know what you are doing as you are dealing with lethal voltages and current even after the microwave has been switched off.

Posted on Aug 01, 2009

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This is usually caused by a blown high voltage rectifier diode.

Here are some links you or someone you know can use for test help, but read their safety warnings first:






line-height:normal">mso-fareast-font-family:"Times New Roman""> http://www.microtechfactoryservice.com/diode.html



line-height:normal">mso-fareast-font-family:"Times New Roman""> http://www.microtechfactoryservice.com/mag_test.html



line-height:normal">mso-fareast-font-family:"Times New Roman""> http://www.microtechfactoryservice.com/xformer.html





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You can usually find helpful exploded view diagrams and order parts by entering your full model number here: http://tinyurl.com/gv383

There should also be a "mini-manual" hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting & testing.

We\'re happy to help and we appreciate your thoughtful rating of our answer.

Jul 01, 2008 | Amana AMV1162 Microwave Oven

1 Answer

Will not heat


The loud pop was almost certainly the high voltage diode going bad. To find parts, I suggest you call the number on your owner's manual or check with the store where you bought it. Sunbeam may not make this part available, so be prepared. Maybe they have authorized servicers in your area. Ask them about that. Good luck.

Sep 21, 2007 | Sunbeam SMW777 Microwave Oven

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