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The Goodman B4022700 In-Shot Burner is a genuine OEM 3-inch single in-shot burner for the AMVC80804CNCA gas furnace and compatible Goodman/Amana models. Each burner directs a metered stream of the gas-air mixture into a heat exchanger tube, where it ignites and transfers heat to the airstream. Corroded, rusted, or clogged burners cause uneven flames, delayed ignition, roll-out, and inefficient combustion — replacing the affected burners restores clean, reliable heating.
In-shot burner geometry — venturi throat, port pattern, and length — is tuned to the furnace's manifold pressure and heat-exchanger design. This factory Goodman burner matches those specs exactly for a correct flame profile. Generic burners can produce the wrong flame shape, leading to sooting, flame roll-out, or a cracked heat exchanger over time. Always match the OEM part number.
Rated Moderate (3/5). Requires shutting off gas and power, removing the manifold or burner-retention bracket, sliding out the old burner, and aligning the new one squarely with its heat-exchanger tube. Replace burners as a matched set when possible and verify flame quality after install. A licensed HVAC technician is strongly recommended for gas-side work.