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The Goodman B4022700 In-Shot Burner is a genuine OEM 3-inch gas burner designed for the ACEC800403AXAB and compatible Goodman/Amana furnaces. The in-shot design directs the air/gas mixture precisely into the heat exchanger tube for clean, efficient, and quiet combustion. Replace burners that are rusted, cracked, clogged, or producing an uneven or yellow flame.
OEM in-shot burners are sized and ported to match your furnace's gas orifice and manifold pressure, ensuring correct flame characteristics and rated efficiency. Generic burners can cause flame impingement, sooting, or rollout. Burners are usually replaced as a matched set for even firing across the heat exchanger.
Difficulty: Moderate — requires removing the burner assembly, swapping the burner, and verifying flame quality and ignition on restart. Shut off gas and power first. Because this involves combustion components, a licensed HVAC technician is recommended.