Attic Fan Making Screeching Noise

Blade is made of thin metal sheets in most of the household fans.

Attic fan making screeching noise.

You may need to remove all fan blades level the mounting plate usually one set screw tightens against a rotating shaft. Due to regular wear and tear these bearings can become worn out or lose their lubrication ability. This can cause the fan to start making constant noise and in some cases even a loud squealing sound. Outdoor fan motors and indoor blower motors squeal loudly when they re going bad.

If the fan blades are imbalanced or bent they can hit against one another or against other parts of the fan. If you hear rattling start by checking the screws or. Squealing sounds of heavy walking from the ceiling. Rattling noises rattling is a common noise with air conditioners as the various fasteners throughout the machine can eventually come loose.

Turn the fan on w o blades to see if the plate wobbles and then replace blades. Reasons behind your attic fan humming noise reason 1 of 4. This will definitely produce noise while the blades are rotating. If the blades are unbalanced you can balance them yourself.

Shut off the fan before examining the blades and see if there s a problem or not. In addition to hearing consistent scratching sounds another important sign you have bats in the attic is high pitched screeches. This happens when the fan doesn t receive enough air. Though bats are typically quiet nocturnal animals they do make high pitched screeching sounds around dusk or dawn.

Due to excessive pressure or sudden strikes these blades might get bent or damaged. 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. The bearings on the motor may be shot leaving the fan to screech as it turns.

Blower and fan noises such as squeaks squeals and rattles may be transmitted through the duct system. And there is no exception with the attic fans as well. The fan on your outside unit is responsible for blowing air over the condensing coils which helps remove the heat from the refrigerant. For some units this sound is normal upon start up.

Attic fans also have small ball bearings that help lubricate the fan s movement. Sometimes the plate the blades mount on can come loose.