American Standard
Mechanical Noise from Condensing Unit
American Standard air conditioner makes loud banging or clanking noises from the outdoor unit
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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
Loose or damaged condenser fan blade, Debris in fan section, Failing condenser fan motor bearings, Loose compressor mounting hardware
How to Fix / Troubleshooting
Safety first: Turn off power to the outdoor unit at the disconnect before inspecting the fan compartment.
- Inspect fan blades: Remove the top grille and check the fan blades for cracks, bends, or looseness on the motor shaft. Tighten the hub set screw if loose; replace damaged blades.
- Remove debris: Clear any sticks, leaves, or foreign objects from the fan and coil area.
- Check motor bearings: Spin the fan blade by hand. If it grinds or wobbles, the motor bearings are likely failing and the motor should be replaced.
- Inspect compressor mounts: Look for broken or missing rubber mounting grommets under the compressor. Replacement is best handled by a technician.
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Repair Difficulty
Medium
3/5
Required Part
Condenser Fan Motor
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