Biasi
Excessive Operational Noise / Vibration
Boiler is very noisy, with whistling, droning, or vibrating sounds 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
Fan bearings worn, Loose casing or mounting brackets, Resonance in flue, Pump cavitation due to air or low pressure
How to Fix / Troubleshooting
Safety: Keep clear of moving parts like the fan and pump when the boiler is running.
- Check system pressure: Low pressure can cause pump noise. Top up to the correct level if needed.
- Bleed air: Remove air from radiators and any automatic air vents to reduce cavitation.
- Tighten panels: Ensure the boiler front cover and side panels are properly secured to reduce rattling.
- Engineer diagnosis: Persistent whistling or droning may indicate fan or burner issues. A technician should inspect and replace worn fan assemblies or adjust combustion.
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Repair Difficulty
Medium
3/5
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