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The Goodman B1392139 View Port Bushing is a genuine OEM grommet/fitting for the sight port on the Goodman GSU060-3 gas furnace. This small bushing seals and protects the inspection opening used to view burner flame and ignition, keeping the combustion area properly closed while still allowing a clear line of sight during service.
Because this is a molded fitting sized to a specific opening, the Goodman OEM bushing guarantees a proper, sealed fit. Generic grommets rarely match the port diameter exactly and can leave gaps that affect combustion sealing. At this price point, there is no reason not to use the exact OEM part.
Very Easy (1/5). A no-tool, press-in replacement. Power down the furnace, pop out the old bushing, and seat the new one into the port until flush.