Electric Attic Fan Is Screeching Sound

It was running at a very low rpm.

Electric attic fan is screeching sound.

This can cause the fan to start making constant noise and in some cases even a loud squealing sound. I couldn t see any. Unless the fan is locked up solid. The bearings on the motor may be shot leaving the fan to screech as it turns.

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. Remove the current worn out bearings and replace them. This will definitely produce noise while the blades are rotating. 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.

Attic fans also have small ball bearings that help lubricate the fan s movement. Fan motor the fan on your outside unit is responsible for blowing air over the condensing coils which helps remove the heat from the refrigerant. 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. The louder the sound the more serious the problem can be.

Most attic fans have belts from the motor to the blades like a car. 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. If the noise is similar to a scream your compressor may be failing. 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.

It would start up and then stop less than a minute later. P p i went into the attic almost passed out and tried to see if there were any lube points. This is the area the squealing noise is coming from. Was gone for about an hour p p came back and the fan is running.

Shut off the fan before examining the blades and see if there s a problem or not. Look on the front or back of the electric motor where the armature spindle extends from the motor. Much of that heat then conducts downward and finds its way into the house. If the fan blades are imbalanced or bent they can hit against one another or against other parts of the fan.

Due to regular wear and tear these bearings can become worn out or lose their lubrication ability. These sounds may be an indication of loose hardware or a failing motor. 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. If this is the problem you ll probably hear the screeching the entire time your air conditioner is running.

Went to hd and lowes picked up a new thermostat and fan motor. When the fan turns on in your compressor unit it should not rattle.