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The Goodman B4022700 3-inch In-Shot Burner is a genuine OEM combustion component for the Goodman/Amana AMVC80805CNBA gas furnace. Each in-shot burner directs a precisely metered air-gas mixture into its heat-exchanger tube, where it ignites and transfers heat to the airstream. Over time burners can rust, warp, or collect scale, causing noisy ignition, delayed light-off, or uneven flame. Replacing worn burners with this OEM unit restores clean, quiet, efficient combustion across the manifold.
The OEM B4022700 is dimensioned to Goodman's exact venturi throat, port pattern, and mounting slot so the flame aligns correctly with the flame sensor and igniter and seats squarely against the heat-exchanger inlet. Generic burners can shift the flame position and disturb rectification, leading to lockouts. Matching burners across the manifold ensures balanced, in-spec combustion.
Moderate (3 of 5). Requires shutting off gas and power, removing the manifold or burner-retention bracket, and sliding out the burners as a set. Replace matching burners together, verify port alignment with the igniter and sensor, then leak-check the gas connections. Budget 45–60 minutes; recommended for experienced DIYers or a technician.