Attic Fan Blades Noise

This might cause due to the striking of the bent blade to other parts of the fan.

Attic fan blades noise.

Remove the current worn out bearings and replace them. In order to get rid of the hum you need to either operate the fan at a low speed or replace the fan with a new one that has more blades. If this common noise comes and goes with airflow that s an easy way to tell if this is the problem. The attic fan tends to makes a humming noise when it has a few blades and is running at a high speed setting.

If the fan blades are imbalanced or bent they can hit against one another or against other parts of the fan. Shut off the fan before examining the blades and see if there s a problem or not. Reason 1 the fan blades are bent upwards and or downwards which causes the fan to be out of balance and therefore wobbles creating a rubbing noise. This can cause the fan to start making constant noise and in some cases even a loud squealing sound.

Solution 1 to fix this check that each fan blade is angled the same use a level and lay it on top of the fan blades bend the fans blades so that they all are angled the same. If the blades are unbalanced you can balance them yourself. Besides being annoying the vibration could lead to loose. Attic fans also have small ball bearings that help lubricate the fan s movement.

In case the fan blades are imbalanced or bent it might call up a humming or rattling noise in the fan. This sound could mean that something is stuck in the blower s fan blades. If you ve had your fan for a decent amount of time and are starting to hear noise from the motor area of the unit it may be time to lubricate the bearings. Blades are essential parts of every fan and there is no difference with attic fan as well.

Due to regular wear and tear these bearings can become worn out or lose their lubrication ability. The vibration is most likely the result of a wobble in the fan that could be caused by some loose screws or a fan blade out of balance.