Panasonic Excessive Vibration / Fan Imbalance

Water heater is very noisy; fan noise or vibration is excessive during operation.

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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.

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Possible Causes

Debris in combustion fan, Loose mounting screws, Misaligned flue causing stress on fan, Worn fan bearings

How to Fix / Troubleshooting

Safety: Turn OFF power before touching the fan or flue. Do not operate the unit with the cover removed except for brief testing by qualified persons.

  • 1. Inspect flue and intake:
    • Ensure the flue is properly supported and not transferring vibration to the building.
  • 2. Check mounting:
    • Remove the front cover.
    • Verify that the fan assembly and other components are securely fastened.
  • 3. Clean fan:
    • Use a soft brush and vacuum to remove debris from the fan blades.
  • 4. If noise persists: The fan motor bearings may be worn; replace the combustion fan assembly via an authorized technician.
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Repair Difficulty

Medium 3/5

Required Part

Combustion Fan Motor Assembly
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