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The B1392139 is a genuine Goodman view-port bushing (sight-glass grommet) designed as a direct-fit replacement for the VCES961005CNAA gas furnace and related models. This small but important component seals the burner-observation port on the furnace cabinet, allowing a technician to inspect flame quality while keeping combustion-area air pressure and clearances correct. A missing or cracked bushing can create an air leak that affects pressure-switch operation and flame stability.
The OEM Goodman bushing is molded to the exact port diameter and heat rating for the furnace's combustion enclosure. Generic substitutes often use lower-temperature plastics that deform or shrink near the burner, breaking the seal. Because this part sits close to the flame, the correct OEM heat-rated material matters.
Easy — A press-in fit that takes only a few minutes. Power down the furnace, pop out the old bushing, and seat the new one into the port. No tools required in most cases.