Why Is My Attic Fan So Loud

The blower wheel and housing will also squeal when they malfunction.

Why is my attic fan so loud. If the switch on temperature is set too low you can bet that the fan will run all summer long and create a noisy disturbance. Attic fan making loud noise. If the blades are unbalanced you can balance them yourself. If your fan has only recently started making noise it may be a sign that the motor is going bad.

Fans in the attic also have small ball bearings that help lubricate the movement of fans. Due to regular wear these bearings can use or lose their lubrication capacity. Due to regular wear and tear these bearings can become worn out or lose their lubrication ability. If the fan blades are imbalanced or bent they can hit against one another or against other parts of the fan.

This happens when the fan doesn t receive enough air. The fan should have a thermostat already. This can cause the fan to start making constant noise and in some cases even a loud squealing sound. Blower and fan noises such as squeaks squeals and rattles may be transmitted through the duct system.

It should be located about 2 ft from the fan and has a. For some units this sound is normal upon start up. Less expensive fans usually have high speed fan motors yet very small turbines. On the other hand fans with larger fan blades and more powerful motors tend to be quieter.

It looks like a little metal box with a shaft that you turn with a screwdriver to set the temp. Insulation will upset the balance of the blower wheel creating noise and reducing air flow. Why is my attic fan so loud. When the fan is turned on it draws attic insulation down from the top of the ceiling into the blower wheel.

This will definitely produce noise while the blades are rotating. This will give the fan the airflow it needs. Shut off the fan before examining the blades and see if there s a problem or not. While they may move a lot of air they can also be loud in general.

Attic fans also have small ball bearings that help lubricate the fan s movement. Remove the current worn out bearings and replace them. If you have a closed off attic open a window at the other end or install one to solve this problem. Both of these are easily checked just remove the grill and look at the blower wheel.