Attic Fan Making Screeching Noise

If the fan blades are imbalanced or bent they can hit against one another or against other parts of the fan.

Attic fan making screeching noise.

If this is the problem you ll probably hear the screeching the entire time your air conditioner is running. The fan on your outside unit is responsible for blowing air over the condensing coils which helps remove the heat from the refrigerant. This happens when the fan doesn t receive enough air. Outdoor fan motors and indoor blower motors squeal loudly when they re going bad.

Reasons behind your attic fan humming noise reason 1 of 4. Attic fan making loud noise attic fans rattling and shaking are quite common and it s a problem faced by many homeowners who have fans. Squealing sounds of heavy walking from the ceiling. For some units this sound is normal upon start up.

Blower and fan noises such as squeaks squeals and rattles may be transmitted through the duct system. The bearings on the motor may be shot leaving the fan to screech as it turns. Sometimes the plate the blades mount on can come loose. This will definitely produce noise while the blades are rotating.

You may need to remove all fan blades level the mounting plate usually one set screw tightens against a rotating shaft. If the blades are unbalanced you can balance them yourself. Due to regular wear and tear these bearings can become worn out or lose their lubrication ability. Though bats are typically quiet nocturnal animals they do make high pitched screeching sounds around dusk or dawn.

If you hear rattling start by checking the screws or. Blade is made of thin metal sheets in most of the household fans. Turn the fan on w o blades to see if the plate wobbles and then replace blades. The blower wheel and housing will also squeal when they malfunction.

Rattling noises rattling is a common noise with air conditioners as the various fasteners throughout the machine can eventually come loose. In addition to hearing consistent scratching sounds another important sign you have bats in the attic is high pitched screeches. Due to excessive pressure or sudden strikes these blades might get bent or damaged. This can cause the fan to start making constant noise and in some cases even a loud squealing sound.

Attic fans also have small ball bearings that help lubricate the fan s movement. If you have a closed off attic open a window at the other end or install one to solve this problem.