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The genuine Goodman B4022700 3-inch In-Shot Burner is a direct-fit replacement for AMVC800805DNAA gas furnaces and other compatible Goodman/Amana 80% AFUE models. In-shot burners deliver the fuel-air mixture into the heat exchanger and are a common wear item—cracked, warped, or rust-clogged burners cause rough ignition, delayed ignition "whumps," and yellow flame. Installing the correct OEM burner restores clean, quiet, efficient combustion.
This is a factory OEM Goodman component built to exact burner-port and venturi tolerances, ensuring proper flame carryover and ignition timing. Aftermarket burners often vary in port geometry, which can cause flame rollout or nuisance lockouts. Always replace burners as a matched set for even firing.
Moderate — Requires shutting off gas and power, removing the burner box, and swapping the burner while maintaining alignment with the igniter and flame sensor. Recommended for experienced DIYers or an HVAC technician.