Question about Whirlpool GH7145XF Microwave Oven
The microwave makes a humming noise when heating/cooking but then the humming sound go away and the microwave is no longer heating/cooking. It is acting almost like when you defrost meat in the microwave. It turns on the heating/cooking and the it turns off the heating/cooking. Sometimes we try heating something up for 30-45 seconds but the heating/cooking never turned on so the food is still cold.
Generally, the most common causes of a failure to heat are:
- bad door switches or door switch mounts
- loose connection at the magnetron
- problem or loose conneciton on the control unit circuit board
- bad magnetron or other high voltage part
If you or a friend decide to look into it, we have critical safety information, info on door switch diagnosis and replacement, and disassembly information at our site, linked here on Fixya: http://tinyurl.com/yzjozk
Posted on Nov 17, 2007
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