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The Goodman B1392139 View Port Bushing is a genuine OEM grommet-style bushing that seals the flame-observation (sight) port on the AMVC960804CNAA furnace and compatible Goodman/Amana models. It provides a clean, sealed opening through the burner-compartment panel so a technician can visually confirm burner ignition and flame quality while the furnace stays sealed against air leaks.
A cracked, brittle, or missing view-port bushing lets combustion-area air draft through the panel, which can affect burner performance and allow the sight port to whistle or leak. This inexpensive bushing restores the factory seal and keeps the observation window serviceable.
The OEM B1392139 is molded to the exact panel-hole diameter and thickness Goodman specifies, so it snaps in flush and seals completely. Generic grommets rarely match both the bore and panel gauge, leaving gaps or falling out. For a heat-exposed sealing part, use the factory bushing.
Very Easy — 1 of 5. Power down the furnace, pop out the old bushing, and press the new one into the panel opening until it seats around the port. Under 5 minutes with no special tools. Confirm the bushing is fully seated for a proper seal.