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The B4022700 is a genuine Goodman/Amana 3-inch in-shot burner for the AMH80704BXCA 80% AFUE gas furnace and other compatible models. In-shot burners deliver a precise gas-air mixture into each heat-exchanger tube for clean, even combustion. Over time burners can rust, warp, or clog with debris, causing rough ignition, flame rollout, delayed light, or uneven heating. Replacing worn burners restores reliable, efficient firing.
This OEM burner is built to Goodman's exact port pattern, throat dimension, and mounting so the flame lights cleanly and seats correctly relative to the igniter and flame sensor. Generic burners can differ in orifice alignment and geometry, producing poor ignition, sooting, or nuisance lockouts. For proper combustion, matching the OEM burner is strongly recommended.
Replacement requires shutting off gas and power, removing the burner assembly, transferring or aligning burners to the manifold orifices, and reseating everything to spec. Plan for 30–60 minutes depending on how many burners are being replaced. Because this work is on the gas and combustion system, we recommend a licensed HVAC technician verify orifice alignment, flame appearance, and safe operation afterward.