How To Tell Attic Fan Is Going Bad

To avoid rotting wood clumping insulation and mold your attic needs to be properly ventilated.

How to tell attic fan is going bad. The fan won t stop even when you shut the ac off. The replacement is quite simple and straightforward. Step 2 test the thermostat. The fan won t start even though the ac is on.

Switch off the power of the attic fan and remove the power cord. Turn the attic fan off and unplug the motor from the thermostat. The fan turns on yet the blades are rotating very slowly. Make sure the thermostat is turned 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. How to check if your ac fan motor is bad in 7 steps. Signs that your fan is having issues include the following. If the fan turns on the motor is still good.

Check for tripped breakers. Ensure the thermostat is on. The temperature in attics without attic fans can climb to as high as 150 degrees f. Is the thermostat on.

This is important because excess heat in the attic will cause damage to roofing material and to the home s siding. Step 1 test the fan motor. With an attic fan many attics have a temperature that is the same as the outside air or just a few degrees warmer. If you notice that the attic fan is not switching on or off according to temperature variation it indicates that the thermostat is no longer functioning properly.

Moreover if you have asphalt shingles on the roof attic. 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. Locate the thermostat casing and open it using a screwdriver. Once done test that the motor still works by plugging the motor into an extension cord that is connected to an outlet.