Last summer my York AC began making a "screeching/screaming" type noise. It would do this intermittantly. I
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This indicates a beraing is going bad on one of the fan motors...inside or outside.could also be a loose hub where the fan blade connects to the hub...in any case if it makes this a lot then the motor needs to be replaced soon before it locks completly up,which it will do eventually
Sounds like bearings in a motor getting ready to go out. If it is the inside unit, it could also be a loose belt that drives the fan.
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