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The B4022700 is a genuine OEM 3-inch in-shot gas burner for Goodman GDT070-3B furnaces and compatible Goodman/Amana models. In-shot burners direct the air/gas mixture into the heat exchanger tubes; over time they can rust, clog with debris, or develop uneven flame carryover that causes rough ignition, delayed lightoff, or a rumbling burner. Replacing worn burners restores crisp, quiet ignition and an even blue flame across the manifold.
Burner geometry controls flame shape and carryover between ports. The OEM B4022700 matches the original venturi, flame-crossover slot, and mounting hook for correct combustion in your GDT070-3B. Generic burners can misalign the flame and cause delayed ignition or sooting. OEM ensures a factory-matched flame pattern.
Easy to Moderate (2/5). Shut off gas and power, remove the manifold, slide out the old burner, and hook in the replacement, aligning the crossover slot. About 20–30 minutes for a full set. Always leak-check the manifold connections before relighting.