Nibe
Mechanical Noise / Wear
Boiler is very noisy during operation (whining, grinding, or rattling)
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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
Worn Nibe circulation pump bearings, Fan motor wear, Loose casing panels, Cavitation due to low system pressure
How to Fix / Troubleshooting
Safety first: Persistent mechanical noise can indicate imminent component failure. Do not ignore.
- Check system pressure: Ensure pressure is within the recommended range to avoid pump cavitation.
- Tighten casing screws: With power off, gently tighten any loose boiler casing screws that may cause rattling.
- Identify noise source: Carefully listen to determine if the noise comes from the pump, fan, or elsewhere.
- Professional replacement: A Nibe technician can replace the noisy Nibe circulation pump or fan assembly and check for air or debris in the system.
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Repair Difficulty
Medium
3/5
Required Part
Nibe Circulation Pump
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