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The Goodman B4022700 3-Inch In-Shot Burner is the genuine OEM gas burner for the AMH81005CXAA furnace and compatible Goodman/Amana 80% AFUE models. Each in-shot burner meters gas into its heat-exchanger tube for clean, efficient combustion. Over time, burners rust, corrode, or clog with debris, causing delayed ignition, rollout, a lazy yellow flame, or short-cycling. Replacing worn burners restores crisp lightoff and even heating across all tubes.
The OEM B4022700 is stamped to the precise port geometry and orifice alignment your furnace was engineered for, ensuring correct flame shape and clearance to the flame sensor. Generic burners often differ slightly in tube length or slot pattern, leading to uneven ignition and nuisance lockouts. For safe, reliable combustion, match OEM.
Moderate (3/5). Requires shutting off gas and power, removing the burner assembly/manifold, and swapping burners one at a time while keeping orifice alignment. Best handled by an experienced DIYer or HVAC tech. Verify flame color and check for rollout after reassembly.