How To Repair Attic Fan Motor

Step 2 add the new motor.

How to repair attic fan motor. Alternatively there will be a bracket that holds the motor in place. You ll need to take out the outer casing of the fan and look to see if the belt is cracked sagging worn out or broken. If however the fan still doesn t turn on the problem is most likely with the fan motor or the thermostat. It s best to hire an electrician to deal with electrical problems.

Turn off the power to the fan at the main breaker panel. Match the colors of the wires and then twist the ends of the bare wires together. Take your new motor and place it into the fan. Some motor plates release by pressing or prying on the side of the fan housing.

The cause of the problem could be the belt. Then unplug the fan and remove the motor plate photo 2. Shield the twisted wiring connections with wire caps. If the fan comes on you have an electrical problem in the circuit the attic fan is on.

Next strip the ends of the wires of the new motor. Remove the mounting bolts that hold the motor onto the steel flange. Fix the wires into the correct positions using your pair of pliers. A fan that won t run is often caused by a failed motor or a bad thermostat.

With fan off go into the attic. Take off the back using the screwdriver and locate the attic fan motor. Remove this by taking off the wires making a note of which ones belong where and unscrewing the motor from the base. Using wire strippers strip the ends of the wires that you cut when you removed the old attic exhaust fan motor.

Most fans have an on off switch that bypasses the fan s thermostat. Others are secured with a screw or two. Sometimes you face an issue where the attic fan s motor comes on but the fan blades don t move. If there s a problem with the belt replace it with a new one.

Tap the motor a few times with the handle end of a hammer or piece of wood as if you were swatting a bug.