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The Goodman B1392139 View Port Bushing is a genuine OEM fitting for the VMS80805CXAA gas furnace and compatible Goodman/Amana models. This small grommet-style bushing seats in the burner-compartment viewing port, sealing the opening while allowing safe visual inspection of the burner flame. Though inexpensive, an intact bushing helps maintain proper compartment pressure and keeps the sight port sealed against air leaks.
The OEM B1392139 is molded to the precise port diameter so it snaps in and seals without gaps. Generic grommets often fit loosely or degrade under heat, letting the bushing fall out and leaving the port unsealed. For a proper, lasting seal at almost no cost, the genuine OEM part is the clear choice.
Rating: Very Easy (1/5). Push-in, no tools required. Simply remove the old bushing and seat the new one in the viewing port. A 2-minute replacement any homeowner can handle after shutting off power.