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The Goodman B4022700 In-Shot Burner is the genuine OEM 3-inch burner for the ACEC801005CXAB and compatible Goodman/Amana gas furnaces. In-shot burners deliver a precisely shaped gas/air mixture into each heat-exchanger tube for clean, efficient combustion. Over time burners can corrode, clog with rust scale, or develop carbon buildup that causes uneven flame, delayed ignition, flame rollout, or sooting — all of which reduce efficiency and can trip safety controls. Replacing worn burners restores reliable, quiet ignition.
The OEM B4022700 is engineered to Goodman's exact port size and venturi geometry, ensuring proper flame travel into the heat exchanger and correct flame-sensor rectification. Generic burners can alter the air/fuel mixture, causing flame rollout or poor ignition. For a combustion component, OEM accuracy is strongly recommended; replace all burners as a matched set.
Moderate (3/5). Requires shutting off gas and power, removing the burner-box cover and manifold, and aligning each burner to its tube and orifice. Plan 45–60 minutes. Gas-line work should be leak-tested; if unsure, use a licensed HVAC technician.