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The Goodman B4022700 is a genuine OEM 3-inch in-shot burner for the AMVC80805CXBA 80% AFUE gas furnace and related Goodman & Amana furnaces. Each in-shot (monoport) burner mixes gas and primary air and fires a stable jet of flame into its heat-exchanger tube. Furnaces use one burner per tube, so replace them as a set if others show rust, cracking, or flame distortion.
Corroded or clogged burners cause rough ignition, yellow or lazy flames, delayed light-off, and rollout trips. Fresh OEM burners restore clean, quiet, even ignition across the manifold.
OEM vs. Generic: The OEM burner matches the venturi geometry, port pattern, and mounting hook Goodman calibrated to this furnace's manifold pressure and orifice size. A generic burner can shift the air/gas mix, producing sooting, noise, or nuisance lockouts. For safe, on-spec combustion, install OEM.
Install difficulty: Moderate (3/5). Shut off gas and power, remove the burner-box cover and igniter/sensor, slide the burner off its manifold hook, and set the replacement so its port aligns with the orifice and heat-exchanger inlet. Budget 30–45 minutes. If you are not comfortable working with gas components, hire a licensed technician.