Trane air conditioner produces a loud banging or clanking noise from the outdoor unit during operation.
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.
Possible Causes
How to Fix / Troubleshooting
Safety first: Turn off power at the disconnect before inspecting the fan or compressor area.
- Inspect fan blade: Remove the top grille and check that the fan blade is tight on the motor shaft and not bent. Tighten the set screw if loose.
- Remove debris: Clear any sticks, rocks, or other objects from the fan and base pan.
- Check mounting: Verify that the compressor and fan motor mounting bolts are tight and rubber isolators are intact.
If the noise is clearly from inside the compressor (metallic knocking), the compressor may be failing and should be evaluated by a Trane technician.
Repair Difficulty
Required Part
We may earn a commission from links on this page.