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The B1392139 is a genuine OEM view port bushing for the Goodman/Amana AMES960403BUAB gas furnace and compatible models. This bushing seals the observation (sight) port on the burner compartment, allowing technicians to verify flame ignition and burner operation while preventing air leaks and maintaining the combustion-area pressure seal. A missing or brittle bushing lets in bypass air that can affect the pressure switch and combustion.
The genuine Goodman B1392139 is molded to the exact port diameter and heat rating for a lasting, airtight seal near the burner area. Generic grommets may not tolerate the heat or may fit loosely, allowing bypass air. OEM ensures a safe, sealed fit.
Very Easy (1 of 5). Press the bushing into the observation port opening by hand. No tools required, under 5 minutes.