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The Goodman B4022700 In-Shot Burner is a genuine OEM 3-inch gas burner for the Goodman/Amana GDT090-4B furnace and compatible models. Each in-shot burner directs the air-gas mixture into a single heat-exchanger tube, producing the clean, stable flame the furnace needs for efficient, quiet combustion. Corroded, rusted, or misaligned burners cause rough ignition, flame rollout, and poor efficiency — making periodic replacement of the burner set good maintenance practice.
The OEM B4022700 is stamped to Goodman's exact port size and venturi geometry, so the burner seats correctly on the manifold and lines up with the igniter and flame sensor. Generic burners can differ slightly in throat diameter and orifice alignment, leading to flame lift, delayed ignition, or sooting. For proper combustion and to keep all burners matched, we recommend genuine OEM — and replacing the full set together.
Easy (2/5). Around 20–30 minutes for a full set. Shut off power and gas, remove the burner-assembly bracket, slide the old burners off the manifold orifices, and install the new ones in the same position and spacing. Reassemble, restore gas and power, and verify smooth ignition and a clean blue flame across all burners. If you observe yellow flames or rollout, shut down and call a licensed technician.