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The Goodman B4022700 3-inch In-Shot Burner is a genuine OEM combustion burner for the GDH80403AXBA and compatible Goodman 80% AFUE gas furnaces. In-shot burners direct a precise jet of gas-air mixture into each heat-exchanger tube, producing the clean, stable flame the furnace relies on for efficient, safe heating.
Over years of cycling, burners can corrode, develop flame-rollout, or clog with debris, causing rough ignition, sooting, or uneven heating. Replacing worn burners as a matched set with genuine OEM units restores proper flame characteristics and burn quality.
Genuine Goodman burners are manufactured to the exact orifice alignment and port geometry required for the correct flame pattern. Generic burners can shift the flame and cause rollout or incomplete combustion. For a combustion component, OEM is strongly recommended for safety.
Moderate — requires shutting off gas and power, removing the burner assembly bracket, and aligning the burner to its orifice. Best performed by an HVAC professional; verify flame after install.