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The Goodman B4022700 3-inch In-Shot Burner is a genuine OEM replacement burner for the AMH80403AXBB gas furnace and compatible Goodman/Amana models. In-shot burners deliver the gas/air mixture into the heat-exchanger tubes for clean, efficient combustion. Over time, burners can corrode, rust, or develop carbon buildup that causes rough ignition, delayed light-off, flame rollout, or a lazy yellow flame. Replacing a failed burner restores reliable, quiet startup and full heating output.
The genuine OEM B4022700 is stamped to the precise venturi geometry and mounting slot of your furnace's burner rack, ensuring correct flame pattern and proper alignment with the igniter and flame sensor. Generic burners may sit at the wrong height or angle, causing sensing faults and lockouts. When one burner fails, replacing the full set with matching OEM burners is best practice.
Requires removing the burner assembly access panel, disconnecting the gas manifold as needed, and sliding the burner off its mounting tab. Verify orifice alignment and flame sensor position on reassembly. Budget 20–30 minutes.
Always shut off gas and power before servicing. Gas-appliance repairs should be performed or verified by a licensed HVAC technician.