Question about Microwave Ovens
Microwave is not heating
Whirlpool built-in Microwave
not heating and has a very loud buzzing noise
This is usually a shorted high voltage rectifier diode or magnetron.
If it's within the magnetron portion of the warranty (usually 5-9 years) but out of the original full warranty (usually 1 year), then your manufacturer will cover the part cost, but not the cost to visit you or the labor charge to do the work.
If you or someone you know decide to look into it, we have critical safety information and disassembly information at our site, and our link is at our listing here on FixYa.
You can usually find helpful exploded view diagrams and order parts by entering your full model number here.
There may 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.
If not, 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 10, 2008
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Posted on Jan 02, 2017
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