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HomeRepair HelpToshiba Microwave RepairToshiba Microwave exhaust fan not working Repair
Toshiba Microwave exhaust fan not working
Is your Toshiba microwave exhaust fan not working? Start with the door switch, which must signal the control board that the door is closed before the fan control can operate. Test the door switch for continuity and replace it if it fails. Next, inspect the exhaust fan motor. Turn the fan blades by hand to check that they move freely, then test the motor for incoming power and continuity. A defective thermostat can also prevent the exhaust fan from starting because it monitors air temperature and activates the fan when needed. Check the grille for grease, debris, or damage that could restrict airflow. If the motor has no power, the control module may be defective, although it is less likely than the motor or wiring. Finally, test the microwave micro switch, which can cause the same door-signal problem as a failed door switch. Enter your Toshiba microwave model number to find the exact replacement part for your appliance. Any repair that requires removing the outer cabinet requires caution because the high-voltage capacitor can store a lethal charge even after the microwave is unplugged. Properly discharge it before interior work, or hire a qualified technician if you are not familiar with capacitor discharge procedures.
01 - Toshiba 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 - Toshiba 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 - Toshiba 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 - Toshiba 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 - Toshiba 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 - Toshiba 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 Toshiba microwave exhaust fan not working?
How do I test a Toshiba microwave door switch or micro switch?
How do I know if the Toshiba microwave exhaust fan motor is bad?
Could the thermostat, grille, or control module cause my microwave fan not to work?
How do I find the correct Toshiba microwave exhaust fan part?
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