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The Goodman B1392139 is a genuine OEM view-port bushing designed for the AMS81405DNA furnace and related Goodman/Amana models. This small but important fitting seals the flame-inspection sight port on the burner compartment, keeping combustion air, flue gases, and drafts contained while giving technicians a clear window to check burner ignition and flame quality. A cracked, brittle, or missing bushing can cause air leaks that affect flame stability and combustion efficiency.
Genuine OEM Goodman bushings are molded to the exact port diameter and heat rating of your furnace, so they seat snugly and resist high-temperature degradation. Universal grommets often fit loosely or harden and crack prematurely near combustion heat. For a proper seal, OEM is the safe choice.
Very Easy (1/5). No tools required in most cases — power down the furnace, pop out the old bushing, and press the new one into the port until it seats. A great low-cost part to replace during routine maintenance.