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Attic fan thermostat test.
How to test an attic fan motor and thermostat.
Step 2 test the thermostat.
If the fan turns on the motor is still good.
Turn the attic fan off and unplug the motor from the thermostat.
When the temperature within the attic reaches a set point the fan will turn on and start venting the heated air cooling the attic space.
A fan that won t run is often caused by a failed motor or a bad thermostat.
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Likewise adjustable thermostats will shut the fan off.
Step 1 test the fan motor.
Once done test that the motor still works by plugging the motor into an extension cord that is connected to an outlet.