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The Goodman B4022700 3" In-Shot Burner is a factory-original combustion burner for the Amana/Goodman AMH81155CNAC gas furnace. In-shot burners deliver a precisely shaped gas-air flame into the heat exchanger tubes; over time they can corrode, rust, or become clogged with debris, causing rough ignition, uneven flame, or roll-out. Replacing worn burners restores clean, efficient combustion.
This genuine OEM burner is stamped to the exact geometry your heat exchanger requires so the flame aligns correctly with each tube. Generic burners can misdirect the flame and lead to hot-spotting or poor ignition. For proper flame alignment, we recommend OEM. Note: replace burners as a matched set for even heating.
Moderate — requires removing the burner assembly and manifold; verify orientation and re-check ignition after install. Best performed by an HVAC technician. Always shut off gas and power first.