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The Goodman B4022700 In-Shot Burner is a genuine OEM 3-inch gas burner for the Goodman/Amana AMH81155CXAA furnace and related 80% AFUE models. Each in-shot burner receives gas from the manifold orifice, mixes it with primary air, and carries the flame into the heat exchanger tube for clean, quiet, and efficient combustion.
Genuine B4022700 burners are stamped to the correct port geometry and length, so the flame carryover, ignition timing, and heat-exchanger fit all match factory design. Generic burners can alter the flame pattern, causing rough ignition, sooting, or flame-sensor dropouts. Replace all burners as a matched set for best results.
Moderate (3/5). Requires shutting off gas and power, removing the burner assembly bracket, and sliding each burner off the manifold. Correct alignment with the igniter and flame sensor is important. Recommended for experienced DIYers or a licensed HVAC technician.