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The genuine Goodman B4022700 3-inch In-Shot Burner delivers the precise gas-and-air mixture your AMEH800603BNAB furnace needs for clean, efficient ignition. Each in-shot burner directs a controlled flame into the heat exchanger tube, and replacing a corroded or rust-flaked burner restores reliable lightoff and even heating across the manifold.
Factory-original burners are stamped and ported to Goodman's exact venturi and flame-carryover spec, ensuring the flame lights cleanly and crosses evenly to adjacent burners. Aftermarket burners frequently misalign the carryover slot, causing delayed ignition, rollout, or sooting. This OEM burner drops into the existing burner rack with no modification.
Moderate (2/5). Shut off gas and power, remove the burner box cover, slide the old burner off its manifold orifice, and seat the replacement. Verify the carryover slots align with neighboring burners. Recommended for DIYers comfortable working around gas components; otherwise use a licensed HVAC technician. Typical install 15–20 minutes.