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The Goodman B4022700 3-Inch In-Shot Burner is a genuine OEM gas burner built for ACVC800805CXAA furnaces and other compatible Goodman/Amana models. In-shot burners fire a precisely shaped flame into the heat-exchanger tubes; correct burner geometry is what keeps combustion clean, quiet, and efficient.
If you see lazy yellow flames, hear rumbling on ignition, or find a burner that is rusted, clogged, or warped, replacing the affected in-shot burner restores proper blue-flame combustion and the rated heat output for that cell.
The OEM burner reproduces the exact venturi diameter, port pattern, and overall length, so the flame lands correctly in the heat exchanger and ignites smoothly off the igniter or carryover. A generic burner with a different bore can cause delayed ignition, flame rollout, or sooting. For a combustion part, OEM accuracy directly affects safety and efficiency.
Rated 3/5. The burner box and manifold typically need to be loosened to slide the burner out and align the new one to the orifice. Plan 30–45 minutes. Because it involves the gas train, a licensed HVAC technician is recommended unless you are experienced with furnace combustion service.