Navien Mechanical Vibration / Imbalanced Fan

Navien furnace cabinet vibrates excessively during operation

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

Debris in combustion fan wheel, Loose mounting screws, Warped fan wheel, Resonance with mounting surface

Safety: Turn off power and gas before opening the unit.

Inspect fan wheel: Remove the front cover and access the combustion fan. Check for debris stuck in the wheel and clean carefully.
Check mounting hardware: Tighten all screws securing the fan, burner, and heat exchanger to the cabinet.
Evaluate fan wheel condition: If the wheel appears warped or damaged, replace the combustion fan assembly.
Isolate vibrations: Ensure the furnace is mounted securely to a solid surface. Add vibration-isolating pads or brackets if necessary.

Medium 3/5

Combustion Fan Motor

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