How to Fix / Troubleshooting

Safety: Turn off power before working near the blower. Rotating parts can cause injury.

Steps to check:

Tighten panels: Ensure the blower door and other access panels are securely fastened. Loose panels can rattle loudly.
Inspect blower wheel: Remove the blower assembly if accessible and check for debris inside the wheel. Clean carefully.
Check set screw: Verify the blower wheel set screw is tight on the motor shaft and the wheel is centered in the housing.
Motor mounts: Inspect rubber isolation mounts or brackets for wear or breakage.

If vibration persists, a technician may need to balance the blower wheel or replace the Daikin blower assembly.

Daikin furnace makes loud rattling or vibration noises when the blower is running.

Possible Causes