Electric Attic Fan Is Screeching 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.

Electric attic fan is screeching sound.

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. The louder the sound the more serious the problem can be. 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.

I couldn t see any. Was gone for about an hour p p came back and the fan is running. Unless the fan is locked up solid. It was running at a very low rpm.

P p i went into the attic almost passed out and tried to see if there were any lube points. Look on the front or back of the electric motor where the armature spindle extends from the motor. 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. 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.

Check for imbalanced or bent blades. Went to hd and lowes picked up a new thermostat and fan motor. Remove the current worn out bearings and replace them. 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 the noise is similar to a scream your compressor may be failing. Much of that heat then conducts downward and finds its way into the house. It would start up and then stop less than a minute later.

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. These sounds may be an indication of loose hardware or a failing 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.

P my attic fan started squeaking this morning. 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. If the fan blades are imbalanced or bent they can hit against one another or against other parts of the fan. When the fan turns on in your compressor unit it should not rattle.

Shut off the fan before examining the blades and see if there s a problem or not. This is the area the squealing noise is coming from.