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The Goodman B4022700 3 inch In-Shot Burner is a genuine OEM replacement component for ADS80703AXA gas furnaces. This in-shot (single-port) burner mixes gas and primary air and carries the flame across the heat exchanger inlet. Over time, burners corrode, rust, or develop carbon buildup that causes rough ignition, delayed light-off, or uneven flame — replacing the affected burner restores clean, quiet, efficient combustion.
This is a genuine Goodman OEM burner, manufactured to exact factory tolerances for proper flame geometry and orifice alignment. Generic aftermarket burners are typically lower cost but can vary in flame pattern, which may affect ignition reliability and heat-exchanger temperature. For safety-critical combustion parts, OEM is the recommended choice.
Moderate — requires removing the burner assembly, gas access, and verification of proper flame after reinstall. Gas appliance work should be performed by or with a qualified HVAC technician. Always shut off gas and power before servicing.