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The Goodman B4022700 is a genuine OEM 3-inch in-shot burner for the ACES800804BXAA gas furnace. In-shot burners direct the gas-air mixture into each heat exchanger tube, where it ignites and transfers heat to the airstream. Over time burners can rust, clog with debris, or develop flame-rollout from carbon buildup, causing rough ignition, sooting, or short cycling. Replacing them restores clean, even combustion across the burner rack.
OEM vs. Generic: The factory B4022700 has the exact venturi throat and port pattern Goodman engineered for this furnace's gas valve and orifice sizing. Generic burners may flow differently, shifting the air-fuel ratio and risking incomplete combustion or flame-sensor dropout. For a safe, code-compliant burn, match OEM. Replace all burners as a set for consistent flame.
Install difficulty: Moderate (3/5). Shut off gas and power, remove the burner assembly, slide the worn burner off its mounting slot, and seat the new one squarely under the igniter and flame sensor. Allow 45–60 minutes. Because this is a gas combustion component, a licensed HVAC technician is recommended; verify flame pattern and check for leaks after install.