Chaffoteaux Poor Combustion / Incomplete Burning

Visible yellow or orange, lazy flames instead of sharp blue flames (where flame is visible).

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

Blocked burner ports, Incorrect gas/air ratio, Blocked flue or air intake, Wrong gas type setting on gas valve

Safety: Poor combustion can produce carbon monoxide. Do not continue to use the furnace.

Turn off furnace: Switch off power and gas.
Check flue terminal: Ensure the air intake and flue outlet are not blocked.
Professional combustion check: A qualified Chaffoteaux technician must clean the burner, check gas valve settings, and perform a combustion analysis with a flue gas analyzer.
Install/Check CO alarm: Ensure a carbon monoxide alarm is installed and functioning near the furnace.

Professional Required 5/5

Main Burner Assembly

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