Question about Whirlpool Microwave Ovens
Did your cooktop lights fail recently? If so, then the circuit board may have been damaged by a surge. We can probably repair that for you.
Otherwise, I would suspect a shorted high voltage diode or bad magnetron.
There should be a "mini-manual" (tech sheet) hidden inside the unit behind the control panel or hidden behind the grille, which is very helpful when troubleshooting, testing, and locating components.
At our Web site, we have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes.
If you don't find your mini-manual, or if you want to look at it before removing the controller, you can download it here.
You can find helpful exploded view diagrams and order parts by entering your full model number (as MH7140XFB0) here.
Here are some links you or someone you know can use for test help, but read their safety warnings first:
(if it's not shorted or burned, it's probably okay)
We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.
Posted on May 28, 2010
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Posted on Jan 02, 2017
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