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HomeRepair HelpQuasar Microwave RepairQuasar Microwave exhaust fan not working Repair
Quasar Microwave exhaust fan not working
If your Quasar microwave exhaust fan is not working, start with the door switch, which may not signal the control board that the door is closed. Test each 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 they do not, replace the motor. If they turn freely, test the motor for incoming power and continuity. A defective thermostat is another likely cause because it monitors air temperature and activates the fan when needed. Check it for continuity and replace it if the circuit is open. If the microwave fan or vent is running but not moving air, inspect the grille for clogs or damage. A failed control module is less common, but it may be at fault if the motor is not receiving power after the motor and wiring check out. Finally, test the micro switch, which can also prevent the control board from recognizing a closed door. Enter your Quasar microwave's model number to find the exact replacement part. If repair requires removing the outer cabinet, remember that the high-voltage capacitor can store a lethal charge even when unplugged. Properly discharge it before interior work, or hire a qualified technician if you are not familiar with capacitor discharge procedures.
01 - Quasar 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 - Quasar 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 - Quasar 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 - Quasar 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 - Quasar 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 - Quasar 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 Quasar microwave exhaust fan not working?
How do I test a Quasar microwave door switch or micro switch?
How do I know if the Quasar microwave exhaust fan motor or thermostat is bad?
Could the grille or control module cause my Quasar microwave fan not to work?
How do I find the correct Quasar microwave exhaust fan part?
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