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The Goodman B4022700 is a genuine OEM 3-inch in-shot burner engineered for AMH80804BNBD and compatible Goodman/Amana 80% AFUE gas furnaces. In-shot burners direct the gas/air mixture into the heat exchanger tubes for efficient, even combustion. A cracked, rusted, or clogged burner causes rough ignition, delayed light-off, or yellow flame — replacing it restores clean blue-flame operation.
OEM B4022700 burners match the factory port drilling and flame profile exactly, so ignition timing and flame sensing stay within spec. Generic burners are lower-cost but may vary in orifice alignment and flame characteristics — for combustion components we recommend OEM for safety and reliability.
Moderate (2/5). Requires shutting off gas and power, removing the burner assembly, and swapping the burner. Confirm flame sensor and orifice alignment on reassembly. Combustion work should be performed by a qualified HVAC technician.