Attic Fan Blades Noise

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.

Attic fan blades noise.

The attic fan tends to makes a humming noise when it has a few blades and is running at a high speed setting. In case the fan blades are imbalanced or bent it might call up a humming or rattling noise in the fan. 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. If the fan blades are imbalanced or bent they can hit against one another or against other parts of the fan.

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. Shut off the fan before examining the blades and see if there s a problem or not. 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.

This might cause due to the striking of the bent blade to other parts of the fan. 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. While this situation might not be critical to the ongoing functioning of your furnace the obstructing object might be creating unnecessary wear and tear on the unit.

Blades are essential parts of every fan and there is no difference with attic fan as well. This will definitely produce noise while the blades are rotating. 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. Remove the current worn out bearings and replace them.

If this common noise comes and goes with airflow that s an easy way to tell if this is the problem. Besides being annoying the vibration could lead to loose.