Electric Attic Fan Is Screeching Sound

Went to hd and lowes picked up a new thermostat and fan motor.

Electric attic fan is screeching sound.

This is the area the squealing noise is coming from. Trying to solve the heat gain problem in your attic by using a fan is like lying out at the beach with a fan blowing over you and thinking you re not. If the attic fan isn t turning on it could be an electrical issue a problem with the thermostat or the motor of the fan that s not working. If the fan blades are imbalanced or bent they can hit against one another or against other parts of the fan.

Check for imbalanced or bent blades. Due to regular wear and tear these bearings can become worn out or lose their lubrication ability. When the fan turns on in your compressor unit it should not rattle. Unless the fan is locked up solid.

The bearings on the motor may be shot leaving the fan to screech as it turns. Your attic fan may not be turning on because of an electrical problem like a tripped circuit breaker a blown fuse or a bad connection. Was gone for about an hour p p came back and the fan is running. Remove the current worn out bearings and replace them.

These sounds may be an indication of loose hardware or a failing motor. Most attic fans have belts from the motor to the blades like a car. Much of that heat then conducts downward and finds its way into the house. The louder the sound the more serious the problem can be.

P p i went into the attic almost passed out and tried to see if there were any lube points. Shut off the fan before examining the blades and see if there s a problem or not. Using a fan to blow hot air out of the attic doesn t address the radiant heat flow from the roof to the attic floor. It was running at a very low rpm.

It would start up and then stop less than a minute later. I couldn t see any. It could be something causing the fan blades to bind but that d make a clattering noise as in a playing card in the bicycle spokes. Look on the front or back of the electric motor where the armature spindle extends from the motor.

If this is the problem you ll probably hear the screeching the entire time your air conditioner is running. This will definitely produce noise while the blades are rotating. This can cause the fan to start making constant noise and in some cases even a loud squealing sound. Attic fans gable vent fans generally aren t made to be serviced the fan is probably pressed onto the motor shaft and there s no practical way to replace it in the field.

Attic fans also have small ball bearings that help lubricate the fan s movement. It may be getting old and stretched and they will screech like crazy off and on until they break get a new belt and adjust it.