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The Goodman B1392139 is a genuine OEM view port bushing for the Goodman ACVC960403BNBA 96% AFUE variable-speed gas furnace. This bushing frames the burner-flame observation port (sight glass) in the furnace cabinet, providing a clean, sealed opening that lets technicians visually inspect the flame and ignition during service while keeping the combustion area enclosed.
Because this bushing sits near the combustion chamber, the correct OEM high-temperature material matters. Generic plastic grommets can warp, discolor, or fail under heat, compromising the seal. Genuine Goodman parts are rated for the application and fit the port opening precisely.
Easy (1/5) — Snaps into the view port opening by hand; no tools needed. Disconnect power and allow the furnace to cool before servicing.