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The Goodman B4022700 is a genuine OEM 3-inch in-shot burner engineered for the AMS81155CXA gas furnace and other AMS8 series models. In-shot burners deliver a precise, directed flame into the heat exchanger tube for efficient, complete combustion. Over time burners can rust, warp, or clog with debris, causing rough ignition, delayed light-off, or uneven flames — replacing them restores clean, quiet, reliable heating.
OEM in-shot burners are stamped to the exact venturi geometry and port pattern the furnace was certified with, ensuring the correct air-fuel mix and flame pattern. Generic burners can alter combustion, trip flame sensors, and even produce sooting or CO issues. For a combustion component, always choose OEM.
Moderate (3/5). Requires removing the burner assembly and manifold, and verifying flame quality after reassembly. Because this is a gas combustion part, professional installation by a licensed HVAC technician is strongly recommended.