How To Test Attic Fan

Turn the attic fan off and unplug the motor from the thermostat.

How to test attic fan.

Once done test that the motor still works by plugging the motor into an extension cord that is connected to an outlet. If the attic fan is plugged into an outlet use a voltmeter to make sure that the outlet is working. Switch off the power of the attic fan and remove the power cord. Locate the thermostat casing and open it using a screwdriver.

If however the fan still doesn t turn on the problem is most likely with the fan motor or the thermostat. Note down the temperature settings for later reference. Also check the wire connections at the fan at an electrical junction or at an outlet box. Attic fan thermostat if your fan has a thermostat turn the fan on and off bypassing the thermostat.

If the fan turns on the motor is still good. Most fans have an on off switch that bypasses the fan s thermostat. It s best to hire an electrician to deal with electrical problems. Now is the time to test the white brown and white wires.

If the fan comes on you have an electrical problem in the circuit the attic fan is on. The cost of repairing the thermostat depends on the cause of the attic exhaust fan problem. Step 1 test the fan motor. The white wire is called the run wire.

Also note down the power rating and the fan capacity in cubic feet per minute. You simply add up the nfas of all your vents and divide that number by the area of the attic to determine whether you re within the 1 150 ratio. Test the first set of wires. If it automatically trips again after resetting it you may have a short in the wires along the circuit.