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The Goodman B4022700 3-inch in-shot burner is a genuine OEM replacement engineered for AMH81205DXBB gas furnaces and compatible Goodman/Amana models. Each in-shot burner directs the gas/air mixture into the heat exchanger tube for a stable, efficient flame. Cracked, corroded, or misaligned burners cause rough ignition, delayed light-off, and yellow flames — replacing them restores clean blue-flame combustion.
OEM vs. Generic: This is a true Goodman OEM burner with the exact port pattern and venturi geometry the furnace was designed around. Generic burners often mis-meter the air/gas mix, leading to sooting and nuisance flame-sensor lockouts. For safe, code-compliant combustion we recommend OEM.
Install difficulty: Easy (1/5). Shut off gas and power, remove the burner retention bracket, slide the old burner off the manifold orifice, and seat the replacement. Verify flame quality on restart. Typically 10–15 minutes for a DIYer comfortable working around the gas manifold.