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The Goodman B1392139 View Port Bushing is a genuine OEM replacement fitting designed for the AMEC960603BNBB gas furnace and compatible Goodman/Amana models. This small but essential rubber grommet seats the sight-glass view port on the burner box, letting a technician safely observe flame color and ignition without exposing the combustion chamber. A cracked, missing, or hardened bushing allows air infiltration and rattling, so replacing it with the correct OEM part restores a proper combustion seal.
OEM vs. Generic: The OEM B1392139 is molded to the exact bore and flange dimensions of the Goodman burner assembly and uses a heat-rated compound that will not deform near the combustion area. Universal grommets are cheaper but frequently sit loose, whistle under blower pressure, or degrade quickly at furnace temperatures. For a leak-free, quiet fit we recommend the genuine OEM bushing.
Install difficulty: Easy (1/5). Power down the furnace, remove the old bushing from the view port opening by hand or with a small pick, seat the new B1392139 into the panel, and confirm it sits flush. No tools or wiring required; typical replacement takes under five minutes.