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The Goodman B4022700 3-inch In-Shot Burner is a genuine OEM replacement component engineered for GDH80403AXBC 80% AFUE gas furnaces. Each in-shot burner delivers fuel to the heat exchanger and mixes it with primary air for a stable, blue flame. Cracked, rusted, or misfiring burners cause rough ignition, delayed lightoff, and sooting — replacing a failed burner restores clean, efficient combustion.
OEM vs. Generic: Genuine Goodman burners are stamped and dimensioned to seat precisely against the burner rack and manifold, ensuring correct flame carryover and gas/air ratio. Generic burners may vary in port geometry, leading to uneven ignition or nuisance flame-sensor faults. For safety-critical combustion parts, OEM is strongly recommended.
Install difficulty: Easy to Moderate. Requires shutting off gas and power, removing the burner assembly, and swapping the individual burner. Basic hand tools only. Always verify flame quality after installation.
Sold individually. Replace all burners as a set if others show wear.