How To Repair Attic Fan Motor

The cause of the problem could be the belt.

How to repair attic fan motor.

Sometimes you face an issue where the attic fan s motor comes on but the fan blades don t move. 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. Others are secured with a screw or two.

Fix the wires into the correct positions using your pair of pliers. Match the colors of the wires and then twist the ends of the bare wires together. Using wire strippers strip the ends of the wires that you cut when you removed the old attic exhaust fan motor. If there s a problem with the belt replace it with a new one.

If however the fan still doesn t turn on the problem is most likely with the fan motor or the thermostat. Step 2 add the new motor. With fan off go into the attic. Shield the twisted wiring connections with wire caps.

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. Most fans have an on off switch that bypasses the fan s thermostat. Then unplug the fan and remove the motor plate photo 2. Take your new motor and place it into the fan.

Spray some lubricant wd 40 or similar into the air ports at the top bottom of the air holes in the fan housing for about 3 to 5 seconds. How to test an attic fan motor and thermostat. It s best to hire an electrician to deal with electrical problems. Alternatively there will be a bracket that holds the motor in place.

Turn off the power to the fan at the main breaker panel. Remove the mounting bolts that hold the motor onto the steel flange. A fan that won t run is often caused by a failed motor or a bad thermostat. If the fan comes on you have an electrical problem in the circuit the attic fan is on.

Some motor plates release by pressing or prying on the side of the fan housing.