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The Goodman B4022700 is a genuine OEM 3-inch in-shot burner engineered for the Goodman/Amana AMS80904BXAA 80% AFUE gas furnace. Each in-shot burner meters and directs the gas/air mixture into a single heat-exchanger tube, so a cracked, corroded, or misfiring burner leads to rough ignition, delayed light-off, and uneven heating. Replacing it with the correct factory part restores clean, quiet combustion.
This is the factory Goodman burner, built to the exact orifice alignment and flame geometry the AMS80904BXAA was certified with. Generic universal burners are cheaper but often require re-shimming and can shift flame position enough to trip the flame sensor or rollout switch. For a furnace-grade combustion part, we recommend the OEM unit to preserve safe, in-spec operation.
Rated Easy for an experienced DIYer. Shut off gas and power, remove the burner assembly bracket, slide out the old burner, and seat the replacement in the same orientation. Verify orifice-to-burner alignment before restoring power. If you are not comfortable working near a gas manifold, use a licensed HVAC technician.
Compatibility tip: confirm your furnace uses 3-inch in-shot burners and count how many your unit requires — many 80% furnaces use one burner per heat-exchanger tube.