Baxi
Gas Flow or Airflow Resonance
Furnace emits a whistling or high-pitched noise 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
Partially blocked burner injectors, Incorrect gas pressure, Flue restriction causing resonance, Fan speed issues
How to Fix / Troubleshooting
Safety: Turn off power and gas if abnormal noises are severe.
- Check flue terminal: Ensure the Baxi flue outlet is not partially blocked or restricted.
- Condensate check: Clear the condensate trap and pipework to prevent flue gas flow disturbance.
- Professional gas check: A gas engineer should inspect burner injectors, verify gas pressures, and adjust fan speed parameters if applicable.
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Repair Difficulty
Professional Required
5/5
Required Part
Main Burner and Gas Valve
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