Ferroli
Combustion Noise / Incorrect Gas-Air Ratio
Boiler or flue makes a loud whooshing or roaring noise when firing, with no error code.
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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
Incorrect gas valve adjustment, Blocked or partially blocked flue, Fan speed issues, Burner contamination
How to Fix / Troubleshooting
Safety first: Abnormal combustion noise can indicate unsafe operation. Do not ignore it.
- User checks: Ensure the flue terminal is not obstructed from outside.
- Engineer actions:
- Perform a full combustion analysis with a flue gas analyser.
- Adjust gas valve and CO₂ settings to Ferroli specifications.
- Inspect and clean the burner and combustion chamber.
- Check fan speed and flue integrity.
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Repair Difficulty
Professional Required
5/5
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