How To Test Attic Fan

If the fan turns on the motor is still good.

How to test attic fan.

Most fans have an on off switch that bypasses the fan s thermostat. Step 2 test the thermostat. Turn the attic fan off and unplug the motor from the thermostat. The cost of repairing the thermostat depends on the cause of the attic exhaust fan problem.

Test the first set of wires. Switch off the power of the attic fan and remove the power cord. Take your multimeter and set it to ohms. If the fan comes on you know that the problem lies with the fan thermostat.

If the fan comes on you have an electrical problem in the circuit the attic fan is on. It s best to hire an electrician to deal with electrical problems. Step 1 test the fan motor. Locate the thermostat casing and open it using a screwdriver.

Note down the temperature settings for later reference. If it automatically trips again after resetting it you may have a short in the wires along the circuit. Also check the wire connections at the fan at an electrical junction or at an outlet box. Now is the time to test the white brown and white wires.

Attic fan thermostat if your fan has a thermostat turn the fan on and off bypassing the thermostat. Once done test that the motor still works by plugging the motor into an extension cord that is connected to an outlet. If however the fan still doesn t turn on the problem is most likely with the fan motor or the thermostat. If the attic fan is plugged into an outlet use a voltmeter to make sure that the outlet is working.