How To Test Attic Fan

Attic fan thermostat if your fan has a thermostat turn the fan on and off bypassing the thermostat.

How to test attic fan.

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. Also note down the power rating and the fan capacity in cubic feet per minute. If it automatically trips again after resetting it you may have a short in the wires along the circuit.

Most fans have an on off switch that bypasses the fan s thermostat. Switch off the power of the attic fan and remove the power cord. Step 2 test the thermostat. Also check the wire connections at the fan at an electrical junction or at an outlet box.

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. It s best to hire an electrician to deal with electrical problems. Now is the time to test the white brown and white wires. Step 1 test the fan motor.

Note down the temperature settings for later reference. Take your multimeter and set it to ohms. If the attic fan is plugged into an outlet use a voltmeter to make sure that the outlet is working. 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 fan turns on the motor is still good. If the fan comes on you have an electrical problem in the circuit the attic fan is on. The white wire is called the run wire.