Recently installed new bulb under the unit to illuminate the stove below. The sudden start-up of the exhaust fan was about 26 hours after the stove was used below it. There is no heat source anywhere near the microwave.
SOURCE: Magic Chef Over-Range Microwave Oven Model:MCO153UBF
The turn table and fan are connected in series with the bulb,as you have mentioned that you have replaced bulb,so please check again for any loose contact on bulb holder or bulb continuity again.
SOURCE: microwave stopped working completely
Fan turned on after cooking because a thermostat got to hot and tripped turning on the fan to try to cool the unit. The unit went completely dead when thermal fuse tripped which is located above the cavity on the left side.
SOURCE: Kenmore microwave shuts off after several seconds
Hopefully the hood / vent fan was always on when boiling on the stove top.
Otherwise moisture can get into and damage the keypad or control circuit board.
That may be the problem.
If this is a convection model, it may have a bad thermistor (not to be confused with a thermostat).
The full model has three more digits, in case you need more help and want to post that.
If you or a friend decide to look into it, we have *critical* safety, disassembly, and troubleshooting info at our site, and our link is at our listing here on FixYa: http://tinyurl.com/yzjozk
You can usually find an exploded view by entering your full model number here: http://www3.sears.com (the 3 is correct)
SOURCE: the fan starts up and runs on its own and we are cooking
That is a normal safety feature.
That's only covered in a very subtle note in the hood fan section of your owner's manual:
NOTE:If the temperature gets too hot around the
microwave oven, the fan in the vent hood will
automatically turn on at the HIGH setting to cool the
oven. It may stay on up to an hour. When this
occurs, the fan can not be turned off.
If
for some reason you don't have your owner's manual, you can download it here.
Enter your model number as MV1610ST with no spaces.
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We're
happy to help you with free advice and we'd appreciate your
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