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The B1392139 view port bushing is a genuine OEM grommet that seals and frames the burner-compartment sight port on the Goodman/Amana AMH80904BNAA 80% AFUE gas furnace. This small but essential fitting lets a technician safely observe the burner flame and ignition sequence while maintaining a proper seal around the inspection opening. A cracked, brittle, or missing bushing can allow drafts and combustion-air disturbance at the port.
The OEM B1392139 is molded to the precise port diameter for a tight, rattle-free snap fit. Generic rubber grommets rarely match the furnace's port bore and can pop loose or degrade under heat. At this price point, the genuine part is always the right choice.
Under 5 minutes with no tools. Power off the furnace, press the old bushing out of the port, and snap the new one into place. No sealant needed.