Question about Panasonic NN-P294SF Microwave Oven

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Fan in microwave won't shut off

Microwave over the range fmv158f frigidaire it won't shut off after you open the dooor and there is no time left to cook/ you take your stuff out and shut the door

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In most cases, it is the door switch. It usually has 2 micro switches and either one can go bad. Not a hard fix. I would look at the operation to see if the switches are working. If that is not it, could be in the circuit board. Could be too much to fix, maybe buy a new one if it is a counter top type. Otherwise let it run till it quits. Call a repair guy, and have him diagnose the problem. Tell him you will fix it in a month or two so could he write down what you need with the part numbers. This way you do not have to start at ground zero. Then order the parts and fix yourself if you feel brave enough.

Posted on Feb 07, 2009

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That is probably a bad primary interlock (bottom door switch).

See this file for help on checking and replacing door switches.

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.

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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.
You can find links to helpful exploded view diagrams and part ordering help here.

I recommend that you bookmark that link to your favorites. We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

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The "hood fan thermal cutout" is designed to turn on the hood vent exhaust fan if the stove top temperature gets too high.

If that fan comes on and stays on, the hood fan thermal cutout may have shorted, needing to be replaced, or its driving relay on the control board may be shorted.

If that's the case, we regularly repair such control panel assemblies nationwide for $39.95 postpaid.

You can find the Frigidaire manual that may help you here.
You can find links to helpful exploded view diagrams and part ordering help here.

I recommend that you bookmark that link to your favorites.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.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

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Completely dead. no light, no heat, electric plugs are good bot no action within the fmv158f microwave oven.


some models have a glass fuse that may blow. take the two screws off the top holding the grill on and remove. also unplug the mw and rub a screwdriver across the plug ends to discharge the capasitor.there should be one screw holding the control pannel on remove it and slowly lift the panel up and off. look for a glass fuse. check it with a meter or bring it to a hardware store. hopefully it is your problem.if not you should call for service.

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Most likely a burned wire somewhere. Check dooor switches, magnetron terminals

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I suggest you see a repairer but until then when ever it's not in use leave the door OPEN

Kind Regards,

J Howard
FixYa Operator

Dec 28, 2008 | Frigidaire FMV156DC Microwave Oven

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