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The Goodman B4022700 3-Inch In-Shot Burner is a genuine OEM replacement burner for the ADSS800804BXAC gas furnace. Each in-shot burner directs a precise gas/air mixture into its heat-exchanger tube for clean, even ignition and stable flame. Replacing a rusted, clogged, or misfiring burner restores proper combustion, quiet startup, and full heating capacity.
In-shot burners must match the furnace's orifice and manifold spacing exactly — even small variations in port size or barrel length change the flame pattern and can cause noisy ignition or incomplete combustion. The OEM B4022700 is built to Goodman's factory flame specification, unlike generic burners that may not align with the manifold or heat exchanger. Replace all burners as a set for the most consistent results.
Difficulty: Moderate. Requires removing the burner assembly and aligning the burner over its orifice. Shut off gas and power, and inspect the flame after reassembly. Best performed by an experienced DIYer or licensed HVAC technician.