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The Goodman B4022700 3" In-Shot Burner is a genuine OEM gas burner designed for the Goodman GDH80403ANAA and compatible Goodman/Amana 80% AFUE gas furnaces. Each in-shot burner delivers a precisely shaped flame into the heat exchanger tube for efficient, even combustion. Burners that are rusted, cracked, or clogged with debris cause rough ignition, delayed light-off, or a noisy 'whoosh' on startup — replacing worn burners restores clean, quiet, reliable heating.
The genuine Goodman OEM burner is manufactured to the exact port geometry and venturi dimensions your furnace was engineered around, so flame carry-over, ignition timing, and CO output stay within spec. Generic burners may vary in port size or throat diameter, which can cause uneven flame, sooting, or nuisance flame-sensor faults. For a combustion component, OEM is the safe choice. Replace all burners in the assembly as a set for consistent performance.
Moderate (2/5). Requires removing the burner assembly and gas manifold, then transferring burners one at a time. Shut off gas and power first, and verify flame appearance after service. If you are not comfortable working around the gas manifold, have a licensed HVAC technician perform the swap.