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HomeRepair HelpLitton Microwave RepairLitton Microwave exhaust fan not working Repair
Litton Microwave exhaust fan not working
Is your Litton microwave exhaust fan not working? The most likely cause is a defective door switch. The door switch signals the control board that the door is closed, allowing the exhaust fan button to function. Test each door switch for continuity with a multimeter and replace any switch that fails. Next, check the exhaust fan motor. Turn the fan blades by hand. If they do not spin freely, replace the motor. If they spin freely, test the motor for incoming power and continuity. A defective thermostat can also prevent the fan from turning on, so test it for continuity and replace it if it has none. Check the grille for grease or other obstructions, and replace it if damaged. If the motor is not receiving power, the control module or wiring may be faulty, although the control module is less common. A defective micro switch can cause the same problem as a door switch. These checks can help with a microwave fan not working or microwave vent not working. Enter your model number to find the exact Litton replacement part. Unplug the microwave before service. Opening the cabinet requires proper high-voltage capacitor discharge because the capacitor can store a lethal charge, even unplugged. Use a qualified technician if you are not familiar with this procedure.
01 - Litton 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 - Litton 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 - Litton 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.
Top Solution
04 - Litton 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 - Litton 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 - Litton 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 Litton microwave exhaust fan not working?
How do I test a Litton microwave fan motor?
Can a door switch cause my microwave fan not to work?
Why is my microwave vent not pulling air even though the fan runs?
How do I find the correct Litton microwave exhaust fan part?
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