Question about Whirlpool Microwave Ovens
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Posted on Jan 02, 2017
The "negative temperature coeffecient" (NTC) thermistor was left unplugged after reassembly or it is defective.
It is the hood thermistor, and should be plugged into connector P4 on the circuit board.
I think it should be at the bottom of the board, on a little tongue-like protrusion, as shown in the attached photo.
There should be a "mini-manual" (tech sheet) hidden inside the unit behind the control panel or hidden on the left side 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 yours, or if you want to look at it without disassembling the oven, you can download it here (just enter your model number).
You can also find helpful exploded view diagrams and order parts by entering your full model number from the tag on the oven here.
We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.
Posted on Aug 17, 2009
Testimonial: "Thanks, using your photo as a reference, pushed NTC in firmly and have no other problems. Thanks again."
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