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The Goodman B4022700 3-inch In-Shot Burner is a genuine OEM single-port gas burner engineered for Amana/Goodman AMH80905CNAA 80% AFUE furnaces. Each burner directs a precise gas-air stream into its heat-exchanger tube for clean, efficient combustion. Furnaces use one in-shot burner per exchanger cell, so a multi-cell furnace may need several to complete the set.
The OEM Goodman burner is stamped to exact venturi and port geometry, ensuring correct flame shape and proper ignition-to-carryover timing. The generic equivalent is a dimensionally compatible aftermarket burner offered at a lower price for budget repairs.
Corroded, cracked, or rusted burners cause rough ignition, delayed light-off, flame rollout, sooting, or a yellow flame. Replacing worn burners restores crisp blue-flame combustion and reliable carryover across cells.
Moderate (3/5) — Requires removing the burner assembly and manifold to slide burners off their ports and re-seat them for correct alignment with the igniter and flame sensor. Shut off gas and power first. Best suited to experienced DIYers or an HVAC technician; 30–45 minutes.