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The B1392139 view port bushing is a genuine OEM sight-glass grommet used on the Goodman/Amana AMVC80604BXAA two-stage variable-speed gas furnace. It seals the inspection port on the burner/combustion access panel, allowing safe visual confirmation of flame ignition while maintaining a proper air seal on the sealed combustion cabinet. A cracked, missing, or brittle bushing can cause a combustion air leak and nuisance pressure-switch or flame-sense faults.
The genuine OEM bushing is molded to the exact port diameter and high-temperature spec of the Goodman cabinet, guaranteeing a leak-free seal. Generic universal grommets may not match the port ID and can degrade near the burner heat, leading to combustion-air leaks. For a sealed-combustion furnace, the OEM part is strongly recommended.
Easy (1/5). Press-fit replacement, no tools required — simply remove the old bushing and seat the new one in the port. Always shut off gas and power before opening the burner compartment.