Exhaust fan is intermittant

My Ge microwave Exhaust fan appears to need help getting going.

if it starts in turbo mode its weak.

when speed is reduced it stops (seams like low power).

when it starts its trying to get the rotation starting.

Is this a motor capacitor or the fan itself??

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Chosen Solution

Cause 1

Exhaust Fan Motor

To determine if the fan motor is defective, remove the fan motor from the microwave and try turning the fan blades by hand. If the blades do not turn freely, replace the fan motor. If the fan blades do turn freely, use a multimeter to test the motor for incoming power and for continuity. If the motor has power but won’t run, replace it. If the motor does not have continuity, replace it.

Cause 2


The thermostat monitors the air temperature and turns on the fan when necessary. If the thermostat is defective, it won’t turn on the exhaust fan at all. Use a multimeter to test the thermostat for continuity. If the thermostat does not have continuity, replace it.

Cause 3

Main Control Board

The main control board might be defective. However, this is not usually the case. Before replacing the control board, first check the exhaust fan motor and wiring. If the exhaust fan motor is not getting power, the main control board might be at fault.

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