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The Goodman B1392139 View Port Bushing is a genuine OEM fitting for the Goodman ACES961005CNAA gas furnace. It seats around the sight/inspection port, providing a clean grommeted opening that lets technicians observe the burner flame while sealing against air leaks and protecting cabinet edges.
The OEM bushing is sized to the exact port diameter and rated for the temperatures near the burner compartment. Generic grommets may not tolerate the heat, can deform, and may not seal the opening correctly, allowing combustion-air leakage.
Very Easy (1/5) — Press the bushing into the view port opening by hand. No tools required; installs in under a minute with power off.