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The Goodman B4022700 3-inch In-Shot Burner is a genuine OEM combustion burner for ACEC800804BXAB gas furnaces. In-shot burners direct the gas/air mixture into the heat exchanger for ignition; over time they can rust, clog, or develop carbon buildup that causes rough ignition, delayed light-off, or uneven flame. Replacing worn burners restores reliable, efficient, and safe heating.
The OEM in-shot burner matches the original venturi geometry and port size, which is critical for correct flame pattern and combustion. An incorrect aftermarket burner can cause flame rollout or poor ignition. Replace all burners as a matched set for best results.
Moderate (3/5). Requires removing the burner-box cover, sliding out the old burner, and reseating the new one in the manifold orifice alignment. Shut off gas and power first; if you're unsure, have a licensed HVAC technician perform the swap.