Comfortmaker Mechanical Noise from Outdoor Unit

Comfortmaker air conditioner is very noisy outdoors; rattling, grinding, or squealing sounds

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

Worn outdoor fan motor bearings, Loose fan blade or mounting hardware, Debris in fan or coil, Vibrating panels or base

Safety: Turn off power at the disconnect before touching the unit.

Steps:

Inspect fan blade: Check for cracks, bent blades, or loose set screw on motor shaft. Tighten or replace as needed.
Remove debris: Clear sticks, leaves, or other objects from the fan and coil area.
Check motor bearings: Spin the fan blade by hand; roughness or play indicates a failing motor.
Tighten panels: Tighten all cabinet screws and add vibration pads under the unit if needed.

Note: Replace the outdoor fan motor if bearings are noisy or seized.

Medium 3/5

Outdoor Fan Motor and Fan Blade

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