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The Goodman B1392139 view port bushing is a factory-original component for Goodman ACVM960805DXAA furnaces and related Goodman/Amana units. It mounts in the furnace cabinet's sight-glass opening, holding the burner-flame view port securely while sealing the cabinet against air leaks around the inspection window.
A worn or aftermarket bushing can let the view port rattle loose or allow air bypass that affects burner observation and cabinet sealing. The OEM B1392139 is sized to the exact port and retains correct fit and heat tolerance, unlike generic grommets that harden and shrink near burner heat.
Easy (1/5). Press-fit into the cabinet opening by hand; no tools needed. Disconnect power and gas before opening the furnace.