Soot or black staining around the flue terminal or on the casing of the Baxi water heater.
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.
Possible Causes
How to Fix / Troubleshooting
Safety: Sooting indicates dangerous combustion and potential carbon monoxide production. Turn off the heater and do not use it until inspected.
User-level:
- Check for obvious flue blockage: Ensure the terminal is clear of obstructions.
Professional: A gas-safe technician must clean the burner, check gas pressures, verify flue integrity, and perform combustion analysis.
Repair Difficulty
Required Part
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