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The Goodman B1392139 View Port Bushing is a genuine OEM grommet-style seal for the flame-inspection sight port on WFD18070S3AXCC furnaces. This small but essential fitting seals the observation opening in the burner compartment, keeping the combustion area airtight so the furnace draws and vents correctly. A missing or brittle bushing can allow air leakage that upsets the flame signal and pressure switch operation.
The genuine OEM bushing is molded to the exact port diameter and rated for the temperatures found in the burner box. Generic grommets can be the wrong size or degrade quickly in high heat, breaking the seal. At this price point, always choose the correct OEM part.
Easy — a snap-in replacement that takes only a few minutes. Turn off power, pop out the old bushing, and press the new one into the port. No tools typically required.