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The Goodman B4022700 is a genuine OEM 3-inch in-shot burner for the AMH81005CXBB gas furnace and compatible Goodman/Amana models. Each burner receives gas through the manifold orifice and directs the flame into the heat exchanger tube for clean, efficient combustion. Rust, scale, or a distorted flame-carry slot causes rollout, delayed ignition, or noisy operation — signs it's time to replace the burner set.
The genuine B4022700 has the correct venturi throat, flame-carry slots, and orifice alignment Goodman engineered for stable ignition and proper flame travel. Generic burners can mis-seat on the manifold and cause uneven flames. Replace as a complete matched set for best results.
Moderate (3/5). Requires removing the burner assembly, sliding burners off the manifold rail, and confirming alignment with the igniter and flame sensor. Basic hand tools needed. Shut off power and gas; a manometer check afterward is recommended.