Rinnai
Excessive Vibration / Fan Noise
Unit is very noisy; loud fan or vibration sounds when running
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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
Loose mounting hardware, Debris in combustion fan, Worn fan bearings, Vent pipe contacting structure
How to Fix / Troubleshooting
Safety first: Turn OFF power and gas before touching the unit or venting.
Steps to check:
- Check mounting: Ensure the Rinnai unit is firmly attached to the wall and all mounting screws are tight.
- Inspect fan and vent: Remove the front cover and look for debris in the fan. Check that vent pipes are supported and not rubbing against framing.
- Add isolation: If vent pipes vibrate against walls or ceilings, add pipe supports or cushioning where allowed.
When to call a professional: If noise persists, the combustion fan motor may need replacement by a technician.
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Repair Difficulty
Medium
3/5
Required Part
Combustion Fan Motor
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