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The B4022700 is a genuine OEM 3-inch in-shot burner for Goodman and Amana gas furnaces, including the AMS81405DXA. In-shot burners direct the gas/air mixture into the heat exchanger tubes, producing the clean blue flame that transfers heat to your home. Rusted, cracked, or clogged burners cause delayed ignition, roll-out, sooting, and uneven heating — replace worn burners as a matched set for consistent combustion.
The OEM Goodman B4022700 is manufactured to the exact venturi geometry and port pattern that pairs with the furnace orifices, ensuring proper gas velocity and flame characteristics. Generic burners can alter the air-fuel mixture and cause flame instability or improper heat-exchanger loading. For safe, in-spec combustion, use OEM.
Moderate (3/5). Requires removing the burner assembly and aligning the burner over its orifice. Shut off gas and power. Recommended for experienced DIYers or an HVAC technician; verify flame appearance after install. About 30–45 minutes.