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The Goodman B1392139 View Port Bushing is a genuine OEM component for the AMSS960403ANAA gas furnace and compatible Goodman/Amana models. This bushing frames and seals the burner/flame view port (sight glass), allowing safe visual inspection of the flame while maintaining the integrity of the combustion enclosure. A cracked or missing view-port bushing can let combustion air leak or allow the sight window to loosen.
The genuine OEM bushing is molded to the exact bore and thickness of the furnace panel opening, ensuring a secure, sealed fit around the view window. Generic substitutes rarely match the port geometry and can leave gaps or fall out. Given the low cost and the combustion-enclosure sealing role, OEM is recommended.
Very Easy (1/5). Under 5 minutes, minimal tools. With power off, remove the old bushing from the view-port opening and press the new bushing into place until fully seated and flush with the panel. Confirm the sight glass sits securely.