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The Goodman B1392139 is a genuine OEM view port bushing for the AMVC960603BNBA modulating variable-speed gas furnace. This bushing seats around the combustion sight-glass / inspection window, providing an airtight grommet that lets technicians observe the burner flame while maintaining the sealed integrity of the combustion chamber. A worn or missing bushing allows air infiltration that can distort flame appearance, trip the pressure switch, and reduce combustion efficiency.
Because this bushing sits adjacent to the combustion area, heat rating and exact diameter matter. The OEM B1392139 is manufactured to withstand sustained furnace heat without shrinking or hardening, keeping a tight seal. Generic grommets can deform under heat cycling, breaking the seal and introducing nuisance lockouts. The genuine part ensures a lasting, leak-free fit.
Easy. Shut off power and gas, remove the burner access panel, press out the old bushing, and seat the new B1392139 into the port opening until flush. No special tools required. Confirm the seal is fully seated before reassembling the panel and restoring service.
Keep your AMVC960603BNBA combustion port sealed and inspection-ready with the genuine Goodman B1392139 bushing.