State Incomplete Combustion / Improper Air-Fuel Mixture

State gas water heater: burner has yellow, lazy flames and produces soot.

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

Restricted combustion air intake, Dirty burner, Incorrect gas pressure, Wrong orifice size

Safety: Sooting can indicate carbon monoxide production. Turn off the heater and ventilate the area. Do not operate until corrected.

Check air intake: Clean the combustion air screen at the base of FVIR models. Ensure the area around the heater is not blocked.
Inspect burner: Have a qualified technician remove and clean the burner and orifice.
Verify gas pressure: A licensed gas fitter should measure and adjust gas pressure to State specifications.

Professional Required 5/5

Main Burner Assembly

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