Sime
Mechanical Vibration / Resonance
Boiler runs but makes a loud humming or vibrating noise through the house
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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 brackets, Pump cavitation, Fan imbalance, Pipework not clipped properly
How to Fix / Troubleshooting
Safety first: Do not touch moving parts while the boiler is running.
- Check system pressure: Low pressure can cause pump cavitation and noise. Top up to 1.0–1.5 bar if needed.
- Inspect external pipe clips: Secure any loose heating pipes near the boiler with proper clips and cushioning to reduce resonance.
- Adjust pump speed (engineer task): The engineer may reduce pump speed or fit anti-vibration mounts if appropriate.
- Fan and burner check (engineer task): The engineer should inspect the fan and burner for imbalance or damage and replace if necessary.
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Repair Difficulty
Medium
3/5
Required Part
Circulation Pump
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