How To Tell Attic Fan Is Going Bad

Once done test that the motor still works by plugging the motor into an extension cord that is connected to an outlet.

How to tell attic fan is going bad.

The temperature in attics without attic fans can climb to as high as 150 degrees f. The fan turns on yet the blades are rotating very slowly. Ensure the thermostat is on. Turn the attic fan off and unplug the motor from the thermostat.

The fan won t stop even when you shut the ac off. Is the thermostat on. You can diagnose it by plugging other electrical appliances that are working into the same outlet and by plugging the fan into a different power outlet. If the fan turns on the motor is still good.

Make sure the thermostat is turned on. With an attic fan many attics have a temperature that is the same as the outside air or just a few degrees warmer. Check for tripped breakers. Moreover if you have asphalt shingles on the roof attic.

Locate the thermostat casing and open it using a screwdriver. This is important because excess heat in the attic will cause damage to roofing material and to the home s siding. How to check attic ventilation. Switch off the power of the attic fan and remove the power cord.

Step 2 test the thermostat. The fan won t start even though the ac is on. The replacement is quite simple and straightforward. How to check if your ac fan motor is bad in 7 steps.

To avoid rotting wood clumping insulation and mold your attic needs to be properly ventilated. It s one of the main culprits. Your attic fan may not be turning on because of an electrical problem like a tripped circuit breaker a blown fuse or a bad connection. Step 1 test the fan motor.