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The Goodman B1392139 view port bushing is a genuine OEM component for the AMEC961005CNAB gas furnace. This bushing seals and protects the sight-glass / inspection port that lets technicians visually check the burner flame and combustion chamber. A cracked or missing bushing can allow air leaks around the port and compromise the sealed-combustion integrity of a high-efficiency furnace.
The OEM Goodman bushing is dimensioned to the furnace's exact port opening and rated for the temperatures near the combustion area. Generic substitutes may not tolerate the heat or seal correctly, risking air leaks around the port. OEM is strongly recommended for sealed-combustion units.
Very Easy (1/5). Press the bushing into the port opening until seated. No tools required; under 5 minutes. Always shut off power before opening the furnace.