How To Repair Attic Fan Motor

If however the fan still doesn t turn on the problem is most likely with the fan motor or the thermostat.

How to repair attic fan motor.

A fan that won t run is often caused by a failed motor or a bad thermostat. Others are secured with a screw or two. Remove this by taking off the wires making a note of which ones belong where and unscrewing the motor from the base. Turn off the power to the fan at the main breaker panel.

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. Take your new motor and place it into the fan. Take off the back using the screwdriver and locate the attic fan motor. Match the colors of the wires and then twist the ends of the bare wires together.

Some motor plates release by pressing or prying on the side of the fan housing. Tap the motor a few times with the handle end of a hammer or piece of wood as if you were swatting a bug. The bolts may be attached to the fan motor itself. The cause of the problem could be the belt.

If the fan comes on you have an electrical problem in the circuit the attic fan is on. Most fans have an on off switch that bypasses the fan s thermostat. Remove the mounting bolts that hold the motor onto the steel flange. Sometimes you face an issue where the attic fan s motor comes on but the fan blades don t move.

Step 2 add the new motor. With fan off go into the attic. Shield the twisted wiring connections with wire caps. Alternatively there will be a bracket that holds the motor in place.

Fix the wires into the correct positions using your pair of pliers. 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. How to test an attic fan motor and thermostat. It s best to hire an electrician to deal with electrical problems.

Then unplug the fan and remove the motor plate photo 2.