How To Tell Attic Fan Is Going Bad

Step 1 test the fan motor.

How to tell attic fan is going bad.

Moreover if you have asphalt shingles on the roof attic. If the fan turns on the motor is still good. The temperature in attics without attic fans can climb to as high as 150 degrees f. How to check attic ventilation.

There s a rattling noise coming from the condenser unit when the fan is turned on. 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. How to check if your ac fan motor is bad in 7 steps. Ensure the thermostat is on.

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. Once done test that the motor still works by plugging the motor into an extension cord that is connected to an outlet. With an attic fan many attics have a temperature that is the same as the outside air or just a few degrees warmer. It s one of the main culprits.

Is the thermostat on. The fan won t stop even when you shut the ac off. 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.

Make sure the thermostat is turned on. To avoid rotting wood clumping insulation and mold your attic needs to be properly ventilated. Locate the thermostat casing and open it using a screwdriver. The replacement is quite simple and straightforward.

The fan won t start even though the ac is on. Signs that your fan is having issues include the following. This is important because excess heat in the attic will cause damage to roofing material and to the home s siding. The fan turns on yet the blades are rotating very slowly.