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The Goodman B4022700 is a genuine OEM 3-inch in-shot burner engineered for the DMS80904BNA 80% AFUE gas furnace and compatible Goodman/Amana models. Each in-shot burner directs a precise jet of gas into the heat exchanger tube, producing clean, even combustion. Rusted, warped, or clogged burners cause delayed ignition, uneven flame, and rollout — replacing them restores safe, efficient heating.
OEM Goodman burners are dimensioned to seat correctly against the manifold and align with the factory orifice for the rated flame pattern. Generic burners may vary in throat geometry, altering the air/fuel mix and flame quality. For proper combustion and safety, genuine OEM is strongly recommended. Replace all burners as a set for even heating.
Moderate (3/5) — Requires shutting off gas and power, removing the manifold/burner assembly, and reseating burners squarely over the orifices. About 45–60 minutes. Gas work — if you're not comfortable, use a licensed HVAC technician.
Fits Goodman and Amana in-shot burner furnaces. Email info@nationalhvacparts.com to confirm your model.