Ruud Improper Combustion

Furnace ignites but produces yellow, lazy flames instead of mostly 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

Dirty burners, Insufficient combustion air, Incorrect gas pressure, Wrong orifice size for fuel type

Safety: Yellow flames can indicate incomplete combustion and CO production. Have the furnace serviced promptly.

Steps to check (visual only):

Check combustion air openings: Ensure louvers on the furnace cabinet and any combustion air grilles are not blocked.
Do not adjust gas yourself: Gas pressure and orifice sizing must be set by a licensed technician.
Schedule service: Request burner cleaning and combustion analysis from a Ruud-qualified technician.

Professional Required 5/5

Burner Assembly

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