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The Goodman B1392139 View Port Bushing is a genuine OEM fitting for the ACVM971005CNAA furnace. This bushing (sight-port grommet) seats in the combustion-chamber view port, providing a clean, sealed opening that lets a technician observe the burner flame while keeping the chamber airtight. A deteriorated bushing can allow air leakage that affects combustion and pressure-switch operation.
This factory-correct replacement restores a proper seal around the flame-viewing port and is an inexpensive part to refresh during routine burner service.
The OEM Goodman B1392139 is sized precisely to the furnace's view-port opening and rated for the temperatures near the combustion chamber. Generic grommets may not tolerate the heat or may fit loosely, breaking the air seal. OEM ensures correct fit and longevity.
Very Easy — about 2–3 minutes, no special tools. With the furnace powered off and cool, remove the old bushing and press the new one firmly into the view-port opening until fully seated and flush. Confirm a snug, airtight fit before returning the unit to service.