Question about Microwave Ovens
Could be a lot of things... If it's quiet when you try to zap something, then suspect a blown fuse inside or a burnt wire or the relay board. If it's extremely noisy when you try to zap something, then suspect the Mag tube, HV diode, or HV capacitor. Also, the windings on your HV transformer could be burnt, but that's not as common as the above mentioned items.
Posted on Nov 17, 2014
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Posted on Jan 02, 2017
With the symptoms you mention, I would suspect:
- loose or corroded connection at the magnetron
- bad magnetron
- shorted high voltage diode
You can usually find helpful exploded view diagrams and order parts by entering your full model number here.
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.
Here are some links you or someone you know can use for test help, but read their safety warnings first:
We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.
Posted on Aug 21, 2008
SOURCE: Microwave won't heat food.
My Whirlpool microwave, over the stove, stopped working when my son used it to heat his food and a heavy sound came out, like something exploded in it. When I check it, there was nothing broke. Everything works fine except that it does not heat. I will appreciate any help
Posted on Nov 09, 2008
Replacing the Magnetron will fix this heating issue you are having with this microwave. The Magnetron is the device that is responsible for the heating action.
Posted on Jun 03, 2009
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