How To Check Thermostat On Exhaust Attic Fan

The cost of repairing the thermostat depends on the cause of the attic exhaust fan problem.

How to check thermostat on exhaust attic fan.

Turn the attic fan off and unplug the motor from the thermostat. With a writing pad take note of the temperature settings power rating of the thermostat and fan capacity in cubic feet per minute for reference purposes. Check the fan s electrical connections with a voltmeter. Also make sure the exhaust of the attic fan is high and near the roof with no obstructions.

Check the intake for any debris. Mount the thermostat in the attic. Return to the service. If the meter reads anything other than zero stop immediately.

An attic fan with a few blades may pick up a humming noise as it runs on a high speed setting. Note down the wiring before proceeding to remove it. Step 3 test the connection between the thermostat and the power source. Once done test that the motor still works by.

Locate the thermostat casing and open it using a screwdriver. Shut off the power to the fan at the main service panel. A fan that won t run is often caused by a failed motor or a bad thermostat. Look for the thermostat casing and using a screwdriver open it carefully.

Step 2 test the thermostat. How to test an attic fan motor. Step 1 test the fan motor. Sometimes it works out more economical to replace the attic fan thermostat instead of repairing it.

A how to demonstration of wiring your xxfirestat or power attic vent thermostat. How to attach a thermostat to an attic fan. 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.

If your fan has a thermostat turn the fan on and off bypassing the thermostat. Also note down the power rating and the fan capacity in cubic feet per minute.