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The Goodman B4022700 is a genuine OEM 3-inch in-shot burner for the Amana/Goodman AMH80804BXBA gas furnace. Each in-shot burner directs a metered gas/air mixture into its heat-exchanger tube for smooth, quiet ignition and an even, stable flame. Rust, scale, or a damaged venturi on a single burner can cause delayed ignition, flame rollout, or noisy startup—so worn burners are typically replaced as a matched set.
OEM vs. Generic: The OEM burner has the correct port pattern, venturi geometry, and mounting slot for your furnace, preserving the factory-tuned air/fuel mixture. Mismatched aftermarket burners can shift flame characteristics and trigger sensing or rollout faults. For combustion parts, OEM is recommended.
Install difficulty: Moderate (2/5). Shut off gas and power, remove the burner-box cover and gas manifold, then lift the burner off its mounting slots and reinstall aligned to the igniter/flame sensor. Budget 30–40 minutes and verify a clean blue flame plus a leak-free manifold afterward.