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The Goodman B4022700 is a genuine OEM 3" in-shot burner used in the burner assembly of AMH81155CXCB and related Amana/Goodman gas furnaces. Each in-shot burner directs the gas/air mixture into a heat-exchanger tube for ignition. Rust, scale, or a distorted burner slot causes uneven flame, delayed ignition, and rollout — replacing worn burners restores a clean, quiet light-off.
OEM in-shot burners are stamped to the exact port geometry the furnace was rated and certified with, ensuring correct flame carryover and CO performance. Generic burners with slightly different slot dimensions can misfire between tubes. For a combustion component, OEM is strongly recommended.
Moderate (3/5). Requires removing the manifold/gas line and burner box, then indexing each burner onto its locating tab. Shut off gas and power first, and verify flame carryover and clean ignition on all burners before returning the unit to service.