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The B1392139 view port bushing is a genuine Goodman/Amana replacement grommet used at the flame-inspection sight port on the AMEC960302BNAA furnace. This small but important fitting seals the viewing opening in the burner or blower compartment, helping maintain proper compartment pressure and keeping the sight port clean and intact. A cracked or missing bushing can allow air leakage that affects combustion and pressure-switch operation.
The genuine OEM bushing is molded to the exact port diameter and made from a heat-rated material suited to the furnace cabinet environment. Generic push-in grommets may not seat fully or may deform near heat, breaking the seal. At this price point there is no reason to gamble on a non-OEM fit.
Easy. Press-fit replacement — no tools required beyond removing the access panel. Cut power at the breaker, remove the old bushing, and snap the new one into the port. Under 10 minutes for most homeowners.