How to Fix / Troubleshooting

Safety: Turn OFF power at the disconnect and breaker before inspecting the outdoor unit.

Inspect fan blade: Remove the top grille and check that the fan blade is tight on the motor shaft. Tighten the set screw if loose.
Remove debris: Clear any sticks, leaves, or foreign objects from the fan shroud and coil area.
Check motor bearings: Spin the fan blade by hand. If it feels rough or wobbles, the motor bearings are likely worn and the motor should be replaced.
Compressor mounts: Inspect the rubber mounting grommets under the compressor. Tighten loose bolts and replace cracked grommets to reduce vibration.
Level the unit: Ensure the Coleman condenser is level on its pad; shim if necessary to reduce vibration.

Warning: Do not bend the fan blades; replace them if damaged.

Coleman air conditioner outdoor unit is very loud, with rattling or grinding noises during operation.

Possible Causes