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The Goodman B4022700 3-Inch In-Shot Burner is a genuine OEM combustion component for the Amana/Goodman AMH80805CNBD 80% AFUE gas furnace. In-shot burners deliver and shape the gas/air mixture into each heat-exchanger tube for clean, efficient combustion. A corroded, rusted, or clogged burner can cause uneven flames, delayed ignition, sooting, or roll-out — replacing the affected burner(s) restores proper flame quality and safe operation.
OEM vs. Generic: In-shot burner length, venturi diameter, and port geometry directly affect flame shape and combustion efficiency. An improperly sized generic burner can cause poor flame carryover, incomplete combustion, and elevated carbon monoxide. This OEM burner is manufactured to the exact factory specification. Replace as a matched set for best results.
Install difficulty: Moderate (2/5). With power and gas off, remove the burner assembly retaining screws, slide out the old burner, and install the replacement in the same orientation aligned with the igniter and flame sensor. After reassembly, verify a crisp blue flame and leak-test the gas connections. Professional installation is recommended if you are unsure.