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The Goodman B4022700 is a genuine OEM 3-inch in-shot burner built for the AMH80703AXCA gas furnace and matching Goodman/Amana 80% AFUE tubular heat exchangers. Each in-shot burner meters the gas-air mixture into one heat-exchanger tube; a warped, rusted, or clogged burner causes rough ignition, delayed light-off, and uneven flames. Replacing a full set restores crisp, even, quiet combustion.
The factory OEM burner is stamped to Goodman's exact port pattern and venturi geometry, so flame carryover and light-off timing match the ignitor and flame sensor. Generic burners often mismeter the flame, tripping the flame sensor or causing noisy ignition. Replace burners as a matched set for best results.
Moderate (2/5) — Shut off gas and power, remove the burner rack/manifold, slide out the old burner, and align the new one over its orifice. Basic hand tools; verify flame quality after start-up. 20–30 minutes.