American Standard Blower Motor or Wheel Noise

Indoor American Standard air handler makes a loud squealing or screeching noise when running

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Worn blower motor bearings, Blower wheel rubbing housing, Loose blower wheel on shaft, Foreign object in blower housing

How to Fix / Troubleshooting

Safety first: Turn off power to the indoor unit before removing blower panels.

  • Inspect blower wheel: Remove the blower assembly and check for rubbing marks on the housing. Re-center the wheel and tighten the set screw on the motor shaft.
  • Remove debris: Clear any insulation, screws, or other objects from the blower housing.
  • Check motor bearings: Spin the wheel by hand. If you hear grinding or feel resistance, the motor bearings are worn and the motor should be replaced.
  • Reassemble carefully: Ensure the blower assembly is properly seated and secured to avoid future rubbing.
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Repair Difficulty

Medium 3/5

Required Part

Blower Wheel and Motor
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