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The B4022700 is a genuine OEM 3-inch in-shot burner for the Goodman/Amana AMEC800804BXAA gas furnace. Each in-shot burner directs a metered gas/air mixture into a heat-exchanger tube, producing the crisp blue flame the furnace relies on for clean, efficient combustion. Over time burners corrode, clog with rust or debris, or develop flame rollout — replacing them with the correct OEM burner restores reliable ignition, even flame carryover, and full heating output.
OEM in-shot burners are built to the exact port pattern, throat diameter, and length that match this furnace's manifold and heat exchanger, so flame position and carryover stay correct. Generic burners with slightly different porting can cause uneven ignition, delayed carryover, sooting, or flame rollout — a safety concern in the combustion path. For burners, matching the factory spec is worth it.
Rating: Moderate (3 of 5). Shut off gas and power, remove the burner assembly/manifold, swap the burner(s), and reinstall — checking alignment with the igniter and flame sensor. Roughly 30–60 minutes. Because this is live-gas combustion work, a licensed HVAC technician is recommended. Always verify clean ignition, proper flame color, and no rollout before returning the unit to service.
Genuine OEM burner — ships fast.