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The Goodman B4022700 3-inch In-Shot Burner is a genuine OEM combustion burner for the AMS80904BXA gas furnace and compatible Goodman/Amana 80% AFUE models. Each in-shot burner directs the air/gas mixture into the heat exchanger for clean, stable ignition and efficient heat transfer. Furnaces use one burner per heat-exchanger tube, so match quantity to your unit's burner count.
Genuine OEM burners are dimensioned for correct flame position, carryover, and ignition timing. Aftermarket burners can misalign with the igniter and flame sensor, causing delayed ignition, soot, or nuisance lockouts. For safe, clean combustion, OEM is recommended.
Moderate (3/5). Requires removing the burner assembly, aligning the burner with the igniter and orifice, and verifying flame quality on restart. Best performed by an experienced DIYer or licensed technician. Always shut off gas and power first.