Water heater flue terminal shows signs of sooting or black deposits.
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: Turn off gas and power. Do not operate the heater if sooting is present; carbon monoxide risk is high.
Steps:
- Check flue terminal: Remove any obstructions around the terminal and ensure adequate clearance as per Biasi instructions.
- Inspect burner (basic): Remove and clean the burner with a soft brush and vacuum to remove soot and debris.
Important: Combustion analysis and gas valve adjustment must be carried out by a licensed gas technician using a flue gas analyser. Do not attempt to tune combustion yourself.
Repair Difficulty
Required Part
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