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The Goodman B1392139 View Port Bushing is the genuine OEM grommet that frames and seals the flame-inspection sight port on ACEC800804BXAB gas furnaces. This small but important part keeps the burner-compartment view window seated and helps maintain a proper combustion-chamber seal. A missing or brittle bushing can allow air leakage around the port and make flame inspection difficult.
The OEM bushing is sized to the exact port diameter and rated for furnace cabinet temperatures. Generic grommets may not seal correctly or withstand the heat near the burner box. For such an inexpensive part, the genuine component is always worth it.
Very easy (1/5). Press the old bushing out and snap the new one into the port opening by hand — no tools needed. Takes under five minutes with the furnace powered off.