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The Goodman B4022700 is a genuine OEM 3-inch in-shot burner for the AMH80453AXCA gas furnace and related Amana and Goodman models. Each in-shot burner directs the gas/air mixture into its heat-exchanger tube, where the igniter or crossover flame lights it for clean, even combustion across the burner rack.
Burners that are rusted, cracked, or clogged with debris cause rough ignition, uneven flame, delayed light-off, and flame-rollout or flame-sense faults. Swapping worn burners for genuine OEM units restores smooth, quiet lighting and proper flame geometry.
OEM in-shot burners are stamped to the exact venturi shape and orifice alignment this furnace was tuned for, so the flame lands correctly in each heat-exchanger tube. Generic burners can shift flame position, disrupt the crossover light, or misread on the flame sensor. For safe, correct combustion, OEM is strongly recommended.
Difficulty: Moderate (2/5). Shut off gas and power, remove the burner-assembly bracket, slide out the old burner, and align the new one over its orifice and heat-exchanger inlet. Roughly 30–45 minutes for a full rack. After service, verify flame appearance, flame-sense microamps, and check for leaks at the manifold.
Genuine OEM replacement part. Gas-appliance work should be performed by a qualified technician. Verify model and serial before ordering.