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The B4022700 in-shot burner is a genuine OEM 3-inch gas burner designed for the Goodman/Amana AMS80904BNA gas furnace. In-shot burners direct a precise gas/air mixture into each heat-exchanger tube, producing the clean, stable blue flame that drives efficient heat transfer. Rust, scale, spider-web blockage, or a corroded burner can cause delayed ignition, roll-out, sooting, or an uneven yellow flame. Replacing a damaged burner restores proper combustion and safe furnace operation.
The OEM B4022700 is dimensioned to seat correctly on the manifold and align the flame into the heat-exchanger inlet, protecting the exchanger from flame impingement. Generic burners can sit at the wrong depth or angle, causing hot spots and premature exchanger failure. For a combustion component, the genuine Goodman burner is the safe choice.
Moderate (3 of 5). Requires removing the gas manifold to slide burners out. Shut off gas and power first, and have a licensed technician verify flame and combustion after replacement. Replace all burners as a set if others show corrosion.