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The B4022700 is a genuine Goodman/Amana OEM 3-inch in-shot burner engineered for the AMH80803BNBD 80% AFUE gas furnace. Each in-shot burner mixes gas and primary air and fires the flame directly into a single heat-exchanger tube. A furnace uses one burner per exchanger cell, so a burner set for an 80,000 BTU furnace typically requires several matched units. Replace any burner that shows rust-out, cracking, flame rollout, delayed ignition, or a lazy yellow flame.
This is a true OEM burner with factory-set port sizing and venturi geometry, which is critical for a clean blue flame and correct CO output. Generic burners with mismatched port dimensions can cause noisy ignition, sooting, and safety-related lockouts. OEM keeps your combustion within spec.
Moderate (3 of 5). Shut off gas and power, remove the burner assembly retaining screws, slide out the old burner, and seat the replacement so it aligns with the ignitor/flame sensor and heat-exchanger inlet. After install, verify flame appearance and confirm proper ignition. We recommend a licensed HVAC technician for gas-side work.
Always confirm your fuel type and orifice sizing before firing the furnace.