Question about Microwave Ovens
Seems to be running but will not heat at all. Also FH3 shows on display when you push popcorn button and the range lights do not come on or the fan.
F3H I assume? That means your humidity sensor has failed.
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, and locating components.
At our site, we now have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes.
You can usually find helpful exploded view diagrams and order parts by entering your full model number here.
If the range lights and hood fan never work, then that's a problem on the control board.
We see (and repair) this a lot. The problem is on the control panel, which we regularly repair nationwide by mail for $39.95 postpaid in about a week.
This light failure often occurs when a bulb goes out and the filament shorts, or when the bulbs are removed or installed without first unplugging the oven from the power line. Either can cause such a failure on the controller.
This can often also affect the exhaust fan operation, too. The lights and fan can be inoperable or stuck on too.
Details of our service and critical safety information and disassembly information is at our site, and our link is at our listing here on FixYa.
Feel free to contact me directly (and please remind me of your model number) for more information & help.
We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.
William E. Miller
Posted on Nov 08, 2008
Tips for a great answer:
Nov 10, 2014 | Whirlpool WMH31017AW 1.7 cu. ft....
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To Use POPCORN:
1. Place popcorn bag on the turntable and close the door.
2. Touch POPCORN once for Regular, or twice for Snack.
Touch START, or wait for the microwave oven to start the
popping cycle automatically.
When the cycle ends, "END" will appear in the display, and
the end-of-cycle tones will sound, followed by reminder
3. Touch OFF or open the door to clear the display and/or stop
I hope that was helpful to you, good luck and take care.
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