How To Check Thermostat On Exhaust Attic Fan

Also make sure the exhaust of the attic fan is high and near the roof with no obstructions.

How to check thermostat on exhaust attic fan. Step 1 test the fan motor. How to test an attic fan motor. If the meter reads anything other than zero stop immediately. Sometimes it works out more economical to replace the attic fan thermostat instead of repairing it.

Look for the thermostat casing and using a screwdriver open it carefully. Switch off the power of the attic fan and remove the power cord. Once done test that the motor still works by. A how to demonstration of wiring your xxfirestat or power attic vent thermostat.

Shut off the power to the fan at the main service panel. Mount the thermostat in the attic. Check the fan s electrical connections with a voltmeter. Turn the attic fan off and unplug the motor from the thermostat.

An attic fan with a few blades may pick up a humming noise as it runs on a high speed setting. Also note down the power rating and the fan capacity in cubic feet per minute. Note down the temperature settings for later reference. Step 2 test the thermostat.

If your fan has a thermostat turn the fan on and off bypassing the thermostat. Return to the service. A fan that won t run is often caused by a failed motor or a bad thermostat. Step 3 test the connection between the thermostat and the power source.

If the fan comes on you know that the problem lies with the fan thermostat. The cost of repairing the thermostat depends on the cause of the attic exhaust fan problem. Locate the thermostat casing and open it using a screwdriver. Check the intake for any debris.

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. How to test an attic fan motor and thermostat.