If your unit is making a high-pitched squealing noise, the issue is usually either the belt connecting the motor to the blower has slipped or the bearings on your condenser fan’s motor. If you have a newer unit, it’s more likely that the issue is the bearings on your condenser fan’s motor.Click to see full answer. In this manner, how do I stop my air conditioner from squeaking?Using a motor lubricant or spray lubricant on the motor shaft can temporarily relieve the noise. This, however, is not a permanent fix and the problem should be tended to by an AC repair professional as soon as possible.Additionally, why is my window air conditioner making a loud humming noise? Fans that produce a rattling or harsh humming noise may be loose or need cleaning. Open the air conditioner cabinet and locate the fan. Remove any debris you see on or around the blades. In some cases insulation or other items may fall into the unit and be noisy due to the movement of the blades. Consequently, how do you fix a squeaky window air conditioner? Step 1 – Make Sure the Unit is Properly Installed. The annoying rattling sound you hear may simply be because the air conditioner is no longer tight in the window frame. Step 2- Check Front Panel Screws. Step 3- Examine the Fan Blades. Step 4- Lubricate the Fan Motor. Step 5- Straighten the Coil Fins. Why does my AC compressor squeal?A loud squeal is produced when the A/C is turned on. This symptom is usually caused by a loose or worn air conditioning compressor belt. This places a load on the engine and the drive belt that rotates the compressor. If the belt is loose or worn the belt can slip on the compressor pulley and emit a loud squeal.