How To Tell Attic Fan Is Going Bad

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

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Locate the thermostat casing and open it using a screwdriver.

How to tell attic fan is going bad.

The fan won t start even though the ac is on. Switch off the power of the attic fan and remove the power cord. There s a rattling noise coming from the condenser unit when the fan is turned on. The fan turns on yet the blades are rotating very slowly.

The fan won t stop even when you shut the ac off. How to check attic ventilation. The temperature in attics without attic fans can climb to as high as 150 degrees f. Signs that your fan is having issues include the following.

Once done test that the motor still works by plugging the motor into an extension cord that is connected to an outlet. Step 2 test the thermostat. Step 1 test the fan motor. It s one of the main culprits.

Turn the attic fan off and unplug the motor from the thermostat. With an attic fan many attics have a temperature that is the same as the outside air or just a few degrees warmer. This is important because excess heat in the attic will cause damage to roofing material and to the home s siding. How to check if your ac fan motor is bad in 7 steps.

Ensure the thermostat is on. Make sure the thermostat is turned on. Moreover if you have asphalt shingles on the roof attic. Check for tripped breakers.

If the fan turns on the motor is still good. The replacement is quite simple and straightforward. 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. 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.