Lennox
Blower Imbalance / Mounting Issues
Furnace vibrates excessively and causes rattling noises in ductwork.
Advertisements
Safety Warning
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.
Advertisements
Possible Causes
Dirty or unbalanced blower wheel, Loose blower housing mounting bolts, Misaligned Lennox blower assembly, Flexible duct connections amplifying vibration
How to Fix / Troubleshooting
Safety: Turn off power before accessing blower.
- 1. Inspect blower wheel: Remove blower assembly and clean dust buildup from blades.
- 2. Tighten hardware: Tighten all blower housing and motor mounting screws.
- 3. Check duct connections: Ensure flexible connectors are intact and not overly stretched.
Severe imbalance may require blower wheel replacement by a technician.
Advertisements
Repair Difficulty
Hard
4/5
Advertisements