My wife was in the attic the other day and said she saw a mouse. It ran down the attic towards the kitchen end of the house. A short time later she heard a noise in the wall behind the microwave. A while after that we used the microwave and noticed the vent fan was not blowing and sounded 'stuck'.
The microwave was in place when we bought the house so I'm not sure how it's hooked up, but there is not a vent cover outside of wall where the microwave is hooked up. Is it possible that somehow the vent was forced up to the attic and the mouse may have found his way down and got lodged in the fan?
If so, what is the recommended best way to fix and remove the 'problem'? Thanks!
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some fans have a charcoal filter that needs replacing others are supposed to be vented out side by the roof or out the wall to see if the vent is going outside you will have to unmount the unit tak it down and check and see if it is conected to a duct in the celing or through the wall hope this helps
You need to change the cavity thermostat. The unit got too hot and blew the cavity thermostat. If this is a vent-a-hood model, it will be up under the vent housing at the top (must drop microwave to change) and if built-in, it will be on the left side under the outer cover. Just remove the screws from the back and sides and right along the edge along the bottom sides. Will have 2 wires going to it from each side. Just replace thermostat and reattach molex plugs. Then retest. Should be fine after that.
Interesting post, because I have the same problem! I have spent the better part of today researching and taking our microwave apart (partially) to inspect the top portion re: outside vent. Everytime the microwave is on, the "active vent door" (manufacturer's term, not mine!) opens. Apparently this is normal. But it also opens when you turn on the vent fan, when cooking on the stovetop. I don't like this feature, because I think it 'overrides' the outside venting system. I double checked our outside vent to ensure that when this oven was installed, the person did in fact allow the flap to be open when the fan is on (he did). So I think what 'our' problem is, is that the microwave active vent sort of interferes with the outside vent, thus more of the cooking smell being blown into the house instead of the outdoors. I was thinking of simply disconnecting the gizmo that make the active vent door open each time you use the oven and/or vent fan option however I don't think that's a good idea as apparently the main purpose of the active vent door is to keep the electronics of the microwave oven from overheating. The more I read about this version of microwave, the less impressed I am with it. Lots of electronic issues with it. I am not fussy either with having the microwave over the cooktop. Sorry I don't have a solution for your problem but I do feel your pain!!!
My husband took the unit off the wall looked down into the fan and found a dead mouse keeping the fan from spinning. We removed the dead mouse cleaned up the area. Turned on the oven. The fan worked perfectly. Then he rehung the microwave.
The fans on an over the stove microwave can be rotated up to 180 degrees depending on how the installer intends to vent the hood. Your fan is pointed forward and venting into the kitchen through a charcoal filter. If you want to vent through the ducting and out of the kitchen, you'll have to drop the microwave down off of the mounting bracket and rotate the fans in the back, pointing the dicsharge upward for a vertical vent, or 180 degrees, if it discharges out the back (wall vent). In both cases, an adapter is necessary, and can be obtained at any hardware store.
Best regards, --W/D--
Most microwave oven fan systems can be rotated for either back or top venting.. This can be done by removing a few screws and rotating the blower housing to the position you need and screwing it back in place.. Hope this helps..
it is triggering the overtemp switch. try to check the vent outlet, it could be clogged with dirt. or the cooling fan of the magnetron is no longer running. could be stuck up because of not being used for a long time.