1. Loose Screws or Mounting
Cause: Fan body or blade screws may be loose.
Fix: Tighten all screws on blades, motor cover, and mounting bracket.
2. Unbalanced Fan Blades
Cause: One blade is heavier or slightly bent.
Fix: Use a blade balancing kit or adjust the blade positions.
3. Dust Buildup
Cause: Dust adds weight and creates shaking.
Fix: Clean blades and motor housing regularly.
4. Worn-Out Bearings
Cause: Old or dry bearings create grinding noise.
Fix: Add light machine oil or replace the motor if needed.
5. Low-Quality or Bent Blades
Cause: Thin or warped blades create “whooshing” sounds.
Fix: Replace the affected blade or upgrade to ABS blades.
6. Fan Not Installed Properly
Cause: Uneven installation leads to vibration.
Fix: Reinstall the mounting bracket securely.
7. Incorrect Speed Setting
Cause: High speed may strain older fans.
Fix: Reduce speed or check motor condition.
