Low and medium speed of fan don't work, but high speed called "turbo" works fine. This is the vent fan. When fan quit working, it popped and also blew out both lights in base of this wall-mounted unit. 2- 40w bulbs. Mic seems to be working just fine, heating things up, etc. didn't trip a breaker. replaced bulbs thinking that somehow was related and the whole light part doesn't work either. Any help appreciated! Thank you for a great site.
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I too was getting the "Vent Fan Off" message, and despite the fact that everything else worked fine with the microwave, I turned the breaker off and back on from my electrical panel. The fan works fine now.
sounds like the cooling fan has came adrift or stopped working , this will cause the magnatron ( the microwave generator ) to overheat tripping the over temperature stat ,so fix the cooling , but be sooooooooooooo carefull in there , microwaves + really high voltages , not really a job for a non electrician/microwave tech
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
our Web site, you can get details of our service, plus we have a video
available showing how to remove a typical
over the range control panel assembly in under 5 minutes.
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.
Feel free to contact me directly (and please remind me of your
full model number) for more information & help.
happy to help you with free advice and we'd appreciate your
thoughtful rating of our answer.
From looking at the owner's manual, it looks like the vent fan is only supposed to come on when the internal temperature of the microwave gets too high OR when you press the VENT FAN pad.
Here are a couple of fan-related excerpts from the owner's manual, which can be found here:
(or the better URL here: http://tinyurl.com/yn7r6g)
An automatic fan feature protects the microwave from too much heat rising from the cooktop below it. It automatically turns on if it senses too much heat.
If you have turned the fan on, you may find that you cannot turn it off. The fan will automatically turn off when the internal parts are cool. It may stay on for 30 minutes or more after the cooktop and microwave controls are turned off.
The vent fan removes steam and other vapors from surface cooking.
Press VENT FAN once for high fan speed, twice for medium fan speed, a third time for low faw speed, or a fourth time to turn the fan off.
Press the VENT FAN BOOST pad for extra fan speed.
Hope this helps.