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The Goodman B4022700 3-Inch In-Shot Burner is a genuine OEM burner engineered for the GDH80403ANBB 80% AFUE gas furnace. In-shot burners fire a precise jet of gas-air mixture into each heat-exchanger tube; this 3-inch burner is sized to match the GDH80403ANBB's burner rack and produces the clean, stable blue flame required for efficient, safe combustion.
Over time burners can rust, clog with debris, or develop flame distortion that shows up as delayed ignition, roll-out, sooting, or a yellow flame. Replacing a damaged burner restores proper flame geometry, protects the heat exchanger, and helps the furnace hit its rated input. Burners are typically inspected and replaced as a matched set for even firing.
The OEM Goodman burner guarantees correct orifice alignment and flame throw for the GDH80403ANBB, which is critical for safe combustion. Our generic-equivalent 3-inch in-shot burner is a cost-saving option built to the same dimensional spec — verify orifice fit before installing.
Moderate (3/5). Requires removing the burner-compartment door and sliding the burner off its mounting bracket and manifold orifice. Shut off gas and power, and always verify flame and check for gas leaks after installation. Professional installation is recommended if you are not comfortable working on combustion components.