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The B1392139 is a genuine Goodman/Amana view-port bushing (sight-glass grommet) for the AMH80804BNAA gas furnace. This small but essential component frames the burner-compartment inspection window, allowing safe visual confirmation of flame and ignition while helping seal the opening against air leakage. Over time the original bushing can crack, melt, or fall out — replacing it keeps the view port clear and properly sealed.
OEM bushings are molded to the exact port diameter and heat rating of your furnace, so they snap in flush and hold up to burner-compartment temperatures. Generic grommets rarely match the opening precisely and can degrade quickly near the combustion area. For a proper, lasting fit, the OEM part is the clear pick.
Rated Easy — a tool-free push-in replacement that takes only a minute. Shut off gas and electric power, remove the old bushing, and press the new one firmly into the port until seated. No wiring or calibration required.