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This genuine OEM Goodman/Amana 3-inch in-shot burner (part number B4022700) is a direct-fit replacement for the AMH81205DNBB gas furnace and related Goodman/Amana models. Each in-shot burner delivers the gas-air mixture into one section of the heat exchanger for ignition. Over time burners can rust, warp, or clog with debris and lint, causing uneven flame, delayed ignition, roll-out, or noisy lightoff. Replacing a damaged burner restores a clean, stable blue flame and efficient, quiet combustion across the burner rack.
The OEM B4022700 is manufactured to the exact orifice alignment, venturi shape, and port pattern the AMH81205DNBB was designed and rated with, ensuring correct flame carryover between burners and proper combustion. Generic burners can differ in venturi geometry and cause misaligned or lifting flames. When replacing burners, it is best practice to replace the full set so all burners match and light evenly.
Moderate (3 of 5). Requires shutting off gas and power, removing the burner-box cover and manifold, sliding the burner off its bracket, and aligning the new burner to the orifice. Verify flame carryover and perform a combustion check after installation.