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The Goodman B4022700 3-inch In-Shot Burner is a genuine OEM gas burner designed for the WGFM28090V5CXAB furnace and compatible Goodman/Amana models. In-shot burners fire directly into the heat-exchanger tubes, delivering a stable, efficient flame for consistent heat output. Furnaces of this size use a bank of these burners — one per heat-exchanger cell.
Rust, scale, spider-web blockage, or corroded burner ports cause rough ignition, delayed light-off, yellow or lifting flames, and rollout faults. Replacing worn burners restores clean, quiet, blue-flame combustion and reliable ignition.
OEM vs. Generic: The OEM burner is machined to the exact orifice alignment, venturi geometry, and mounting slot of the original, so the flame lands correctly in the heat-exchanger cell. Generic burners can sit at the wrong depth or angle, causing flame impingement and premature heat-exchanger wear. We recommend replacing the full burner set at once and using OEM parts for a matched combustion profile.
Install difficulty: Moderate (3/5). Requires shutting off gas and power, removing the burner assembly/manifold, and swapping burners so each seats squarely over its orifice. Plan 30–60 minutes for a full set, verify flame quality after startup, and confirm no gas leaks. Best handled by a technician or experienced DIYer.