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Click on the following link which will take you to Whirlpool's web page where you can enter the model number for the required manual. Note that you need to give the exact model number in order to find the manual. This can be found inside the microwave oven on the rim according to Whirlpool's website.
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 connection on the control unit circuit board - bad magnetron or other high voltage part (such as a shorted diode)
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, 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
There should also be a very helpful "mini-manual" hidden inside the unit behind the control panel. It's very helpful when troubleshooting.
If you need further assistance, please feel free to contact me directly through the links at our site: http://tinyurl.com/yzjozk
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