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The Goodman B4022700 3" In-Shot Burner is a genuine OEM combustion burner built for the AMH80803BXAA gas furnace and compatible Goodman/Amana 80% AFUE models. Each in-shot burner mixes gas and air and directs a stable flame into a single heat-exchanger tube. Furnaces use one burner per tube, so worn, rusted, or clogged burners should be replaced as a matched set for even, quiet ignition.
The OEM B4022700 is stamped to the exact venturi geometry and orifice alignment Goodman engineered for clean, low-NOx combustion. Generic burners can shift the flame carryover between tubes, causing delayed ignition, roll-out, or sooting. OEM guarantees correct flame pattern and manifold spacing.
Moderate (2/5) — Requires removing the burner assembly, sliding the burner off the manifold, and re-seating it against the heat exchanger. Shut off gas and power first, and verify flame carryover after restart.