Wolf Improper Combustion/Yellow Flame

Furnace ignites but produces yellow, lazy flames instead of sharp blue flames.

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, Dirty burner ports on Wolf furnace, Incorrect gas pressure or orifice size, Blocked heat exchanger or flue

Safety: Yellow flames can indicate carbon monoxide risk. Turn off the furnace and have it inspected if you see persistent yellow flames.

Combustion air: Ensure combustion air openings or intake pipes are not blocked.
Burner cleaning: With power and gas off, remove and clean burners, ensuring all ports are clear.
Vent inspection: Check the flue for obstructions.
Professional combustion check: A technician should perform combustion analysis and verify gas input and orifice sizing per Wolf specifications.

Professional Required 5/5

Wolf Burner Assembly

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