Certikin Sooting / Poor Combustion

Visible soot deposits around the flue terminal or on the top of the Certikin gas heater.

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

Insufficient combustion air, Blocked or undersized flue, Incorrect gas/air ratio, Dirty burner or blocked injectors on Certikin heater

Safety first: Sooting indicates potentially dangerous combustion. Turn off gas and power immediately.

Check ventilation: Ensure all combustion air vents to the plant room are open and unobstructed.
Inspect flue terminal: Remove any obstructions and verify correct clearances.
Do not clean internally yourself: Internal burner and flueway cleaning must be done by a qualified gas engineer.

Do not operate the heater again until a Gas Safe (or equivalent) engineer has inspected and corrected the combustion problem.

Professional Required 5/5

Certikin burner assembly / flue system

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