Electric Attic Fan Is Screeching Sound

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This will definitely produce noise while the blades are rotating.

Electric attic fan is screeching sound.

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. This can cause the fan to start making constant noise and in some cases even a loud squealing sound. 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.

Due to regular wear and tear these bearings can become worn out or lose their lubrication ability. P p i went into the attic almost passed out and tried to see if there were any lube points. Went to hd and lowes picked up a new thermostat and fan motor. It would start up and then stop less than a minute later.

Much of that heat then conducts downward and finds its way into the house. Look on the front or back of the electric motor where the armature spindle extends from the motor. It was running at a very low rpm. These sounds may be an indication of loose hardware or a failing motor.

The louder the sound the more serious the problem can be. Attic fans also have small ball bearings that help lubricate the fan s movement. Was gone for about an hour p p came back and the fan is running. The bearings on the motor may be shot leaving the fan to screech as it turns.

Check for imbalanced or bent blades. P my attic fan started squeaking this morning. If the fan blades are imbalanced or bent they can hit against one another or against other parts of the fan. I couldn t see any.

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. 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. Remove the current worn out bearings and replace them. 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. 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. When the fan turns on in your compressor unit it should not rattle. This is the area the squealing noise is coming from.

Unless the fan is locked up solid. 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.

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