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The Goodman B4022700 3-inch In-Shot Burner is a genuine OEM replacement for ACES800603AXAA gas furnaces and compatible Goodman/Amana 80% AFUE units. The in-shot burner directs the gas/air mixture into the heat exchanger tube where it ignites and burns. Over time, burners corrode, clog with rust scale, or warp from heat cycling, producing rough ignition, flame rollout, or uneven heating. Installing the correct OEM burner restores a clean, properly shaped flame and reliable cross-lighting between burner tubes.
Genuine OEM Goodman burners are stamped to the exact port pattern and venturi geometry of the original, which is critical for proper flame shape and carryover. Generic burners may light unevenly or sit at the wrong depth relative to the igniter and flame sensor. For a combustion component, OEM is strongly recommended for safety and performance.
Moderate (3/5). Requires shutting off gas and power, removing the burner-bracket retaining screws, sliding the burner off the manifold orifice, and confirming proper alignment with the igniter and flame sensor. Best performed by an HVAC technician; verify clean cross-lighting after install.