Whirlpool Microwave Exhaust Fan Not Working


The 3 most common part(s) or condition(s) which cause the symptom Microwave exhaust fan not working are listed below starting with the most likely. Check or test each item and watch any available videos.

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Exhaust Fan Motor - Part # 1394041 Mfg Part # W10117942

Exhaust Fan Motor

RepairClinic Item # 1394041

If the exhaust fan does not run the fan motor might be bad. Remove the fan motor from the microwave oven and see if the blades can be turned by hand. They should turn very freely, if they're stiff the fan motor will need to be replaced. The fan motor can also burn out. To test this use an Ohm meter. The motor should have continuity. If it doesn't, replace it.

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Thermostat - Part # 903788 Mfg Part # 8183703


RepairClinic Item # 903788

If the microwave exhaust fan is not working the thermostat might be defective. The thermostat senses the air temperature and turns on the fan as needed, if it's defective it won't turn on the fan. Watch our video on testing thermostats.


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Main Control Board - Part # 1178021 Mfg Part # 8206448

Main Control Board

RepairClinic Item # 1178021

If the microwave exhaust fan is not working check the exhaust fan motor and wiring. If they are good the main control board might be defective.

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