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Ge window ac making a noise after it is on for a while. a sort of soft screeching noise. what could it be

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More than likely it's the fan motor's bearings running dry.

For the past several years the mfc's have been installing 'oil-less' motors in most window units (in order to sell more units/motors of course) - but there's always a chance your motor can be oiled, so I would check it out and see if there's a place to put oil in - sometimes there will be a plastic stopper in the hole (on the motor) and all you have to do is pull it out and add oil. Note: look for a place on both sides of the motor to oil.

If by chance you don't have a place to oil the motor, you can always try drilling a hole on top of the bearing(s) - (which I've done with moderate success in the past) and then squirt oil in the hole you drilled.

All of this is assuming it is your fan motor (most likely cause) - but there could always be something else, as in the compressor bearings - in which case you can't do anything about - but I would bet it's the fan motor.

hope this helps

Posted on Jul 05, 2010

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