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HomeRepair HelpRoper Microwave RepairRoper Microwave exhaust fan not working Repair
Roper Microwave exhaust fan not working
If your Roper microwave exhaust fan is not working, the most likely cause is a defective door switch. The primary or secondary door switch may not tell the control module that the door is closed, so the exhaust fan button will not function. Test each door switch, including the micro switch, for continuity and replace any switch that fails. Next, check the exhaust fan motor. The fan blades should turn freely by hand. If they do not, replace the motor. If they turn freely, test the motor for incoming power and continuity. A defective thermostat can also keep the fan from turning on, while a clogged or damaged grille can restrict airflow even when the motor runs. If the motor is not receiving power, the control module may be faulty, although this is less common. These checks can help with a microwave fan not working or microwave vent not working. Enter your model number to find the exact replacement part for your Roper microwave. If any repair requires removing the outer cabinet, unplug the microwave first. The high-voltage capacitor can store a lethal charge even when unplugged and must be properly discharged before interior work. Use a qualified technician if you are not familiar with capacitor discharge procedures.
01 - Roper 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 - Roper 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 - Roper 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 - Roper 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 - Roper 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 - Roper 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 Roper over-the-range microwave exhaust fan not working?
How do I test a Roper microwave exhaust fan motor?
Can a microwave door switch cause the exhaust fan not to work?
Why does my Roper microwave vent fan not pull air even though the fan runs?
How do I find the correct Roper microwave exhaust fan part?
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