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The B4022700 is a genuine OEM 3-inch in-shot burner for the Goodman/Amana AMS80905CXA 80% AFUE gas furnace and many compatible models. Each in-shot burner directs the air/gas mixture into its heat-exchanger tube, where it ignites into a clean, controlled flame. Over years of firing cycles, burners can rust, clog with debris, or distort — causing noisy ignition, delayed lightoff, sooting, or uneven heating. Replacing worn burners restores crisp, efficient combustion.
Burner geometry controls flame shape, position, and combustion quality. This factory-original Goodman burner matches the exact port size and orifice alignment your heat exchanger and manifold were designed around. Generic burners can misdirect the flame, cause flame impingement or rollout, and reduce efficiency. For a combustion component, OEM fit is strongly recommended — and replace all burners as a matched set for even firing.
Moderate (3/5). Shut off gas and power. Remove the burner-compartment door, disconnect the igniter/flame sensor as needed, and slide the burners off the rack. Install the new burner in the same position, ensuring proper alignment with the orifice and heat-exchanger tube. Recommended for experienced DIYers or an HVAC technician — verify a clean blue flame and correct combustion after service.
Restore clean, efficient heat with a genuine Goodman B4022700 in-shot burner.