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The Goodman B4022700 is a genuine OEM 3-inch in-shot burner engineered for the AMVC80805DNCA 80% AFUE two-stage gas furnace. In-shot burners mix gas and primary air to deliver a stable, blue flame into the heat exchanger. Over years of cycling, burners can corrode, warp, or develop carbon buildup that causes rough ignition, delayed light-off, or an uneven flame — replacing the burner restores clean, quiet, efficient combustion.
The OEM B4022700 matches factory burner port geometry and venturi spacing exactly, so flame pattern and BTU input stay within spec. Generic burners may fit physically but can shift the flame envelope, tripping the flame sensor or roll-out switch. For a furnace this size we recommend replacing all burners as a matched set for an even burn.
Rating: Easy (2/5). The burner slides off the manifold orifice and locates on the heat-exchanger tube — typically no tools or one screw. Always shut off gas and power first, and confirm proper flame carry-over after relighting. If unsure about gas connections, use a licensed HVAC technician.