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The Goodman B4022700 is a genuine OEM 3-inch in-shot burner designed as a direct replacement for the ACEC800603AXAA and compatible Goodman/Amana gas furnaces. Each in-shot burner directs a precise gas-air mixture into a single heat-exchanger tube, and a clean, correctly shaped burner is critical for reliable ignition, a stable flame, and efficient, complete combustion.
OEM burners are stamped to the exact port geometry and length the heat exchanger was engineered around, ensuring proper flame carryover and crossover ignition between cells. Generic burners can sit at the wrong depth or alter the flame pattern, causing rollout, sooting, or delayed ignition. For combustion components, OEM is the safe choice — replace burners as a matched set when possible.
Shut off gas and power. Remove the burner-box cover and manifold, slide the worn burner off its orifice, seat the new burner squarely on the same orifice and alignment slot, and reassemble. Allow 30–45 minutes. After install, verify clean blue flames with full crossover and check for rollout before closing up.