Step 1 test the fan motor.
How to check thermostat on exhust attic fan.
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Turn the attic fan off and unplug the motor from the thermostat.
Once done test that the motor still works by.
The cost of repairing the thermostat depends on the cause of the attic exhaust fan problem.
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Sometimes it works out more economical to replace the attic fan thermostat instead of repairing it.
Return to the service.
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Step 2 test the thermostat.
Mount the thermostat in the attic.
Also note down the power rating and the fan capacity in cubic feet per minute.
How to attach a thermostat to an attic fan.
It helps to cool your home temperatures and the attic by approximately 30 degrees.
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Note down the temperature settings for later reference.
Step 3 test the connection between the thermostat and the power source.
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Note down the wiring before proceeding to remove it.
If your fan has a thermostat turn the fan on and off bypassing the thermostat.
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Switch off the power of the attic fan and remove the power cord.
Shut off the power to the fan at the main service panel.
The whole house fan is installed inside the attic between the living space and ceiling.
If the meter reads anything other than zero stop immediately.
If the fan comes on you know that the problem lies with the fan thermostat.
This way you can duplicate your old settings when you install the new thermostat.
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How to test an attic fan motor.
The warm air escapes through the attic and to the attic vents allowing the circulation of chilly air from the windows.
Whole house fans work on the principle of removing the hot and humid air out of the house.
Locate the thermostat casing and open it using a screwdriver.