Vaillant Outdoor Fan Bearing Failure or Debris Contact

Outdoor unit makes loud grinding or squealing noise

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, Fan blade hitting shroud or grille, Foreign object stuck in fan, Loose fan blade on motor shaft

Safety: Isolate power at the outdoor disconnect before approaching the fan.

Visual inspection: Look through the grille for sticks, leaves, or other debris contacting the fan blade. Remove any obstructions.
Check blade tightness: Remove the top grille if necessary and ensure the fan blade is firmly secured to the motor shaft.
Spin test: Rotate the fan blade by hand. Roughness or grinding indicates bearing failure.
Replace motor: If bearings are noisy, replace the outdoor fan motor and inspect the blade for damage.

Medium 3/5

Outdoor Fan Motor

Check Price on Amazon

We may earn a commission from links on this page.