Question about Microwave Ovens
When it's plugged in, does it still try to come on?
If so, it may have a failing keypad.
And if it ran empty for too long, it may have overheated and damaged the magnetron too.
I don't see a thermostat or thermal cutout mentioned in the exploded views and parts lists, but it pretty much has to have one.
There should 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.
This is one case where that will come in handy.
If you or someone you know wants to look into this, we have critical safety, disassembly, and troubleshooting info at our site, and our link is at our listing here on FixYa: http://tinyurl.com/yzjozk
You can usually find helpful exploded view diagrams and order parts by entering your full model number here: http://tinyurl.com/gv383
We're happy to help and we appreciate your thoughtful rating of our answer.
Posted on Jul 12, 2008
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Posted on Jan 02, 2017
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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
At our site, we have critical safety information, info on door switch diagnosis and replacement, and disassembly information.
See our listing here on FixYa: http://tinyurl.com/yzjozk
Oct 14, 2007 | Whirlpool MH7135XE Microwave Oven
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