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HomeRepair HelpJenn Air Microwave RepairJenn Air Microwave exhaust fan not working Repair
Jenn Air Microwave exhaust fan not working
When your Jenn Air microwave exhaust fan is not working, start with the door switch, which may fail to tell the control module that the door is closed. Test the primary, secondary, or related door switch for continuity with a multimeter and replace any switch that fails. Next, check the exhaust fan motor. The fan blades should turn freely by hand; if the motor has incoming power but will not run, or lacks continuity, replace the motor. A defective thermostat can also keep the fan from turning on, so test it for continuity. If the motor runs but the vent is not pulling air, inspect the grille for grease, debris, or visible damage. The control module is a less common cause and should be checked only after confirming the motor and wiring are sound. A micro switch can create the same door-signal problem as a door switch. Enter your model number to find the exact Jenn Air replacement part for your microwave. If repair requires removing the outer cabinet, remember that the high-voltage capacitor can store a lethal charge even when unplugged. Proper capacitor discharge is required before interior work, and a qualified technician should handle it if you are not familiar with the procedure.
01 - Jenn Air Microwave Door Switch
A defective door switch may not signal the control board that the door is closed, which can prevent the button that controls the exhaust fan from functioning. To determine if any of the door switches are defective, use a multimeter to test each of the switches for continuity. If any of the door switches do not have continuity, the switch or switches should be replaced.
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02 - Jenn Air Microwave 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.
Top Solution
03 - Jenn Air Microwave Thermostat
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.
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04 - Jenn Air Microwave Grille
A damaged or clogged grille can prevent the air from being properly exhausted when the exhaust fan is turned on. Confirm the grille is free of obstruction and, if the grille is visibly damaged, replace the component with a new one.
Highly Likely
05 - Jenn Air Microwave Control Module
If the microwave exhaust fan is not working, the control module might be defective. However, this is not usually the case. Before replacing the control module, first check the exhaust fan motor and wiring. If the exhaust fan motor is not getting power, the control module might be at fault and require replacement.
Common
06 - Jenn Air Microwave Micro Switch
A defective micro switch may not signal the control board that the door is closed, which can prevent the button that controls the exhaust fan from functioning. To determine if any of the micro switches are defective, use a multimeter to test each of the switches for continuity. If any of the switches do not have continuity, the switch or switches should be replaced.
Common
Frequently Asked Questions
Why is my Jenn Air microwave exhaust fan not working?
How do I test a Jenn Air microwave exhaust fan motor?
Can a door switch or thermostat stop the microwave vent fan from working?
What should I check if my Jenn Air microwave vent is not pulling air?
How do I find the correct Jenn Air microwave exhaust fan part?
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