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The Goodman B1392139 view port bushing is a genuine OEM fitting for the VMES801005CXAA furnace. It seats in the burner-compartment sight-glass opening, holding the view port lens in place while sealing the observation port so combustion air and flame-rollout paths stay controlled. This small but important component keeps the burner box airtight and lets technicians safely inspect burner flame during service.
Because it sits adjacent to the combustion chamber, this bushing must tolerate sustained heat without deforming. The OEM B1392139 is molded from the correct high-temp compound and matches the port diameter exactly. Generic grommets risk shrinking, cracking, or falling out, breaking the burner-box seal.
Easy (1/5). Press the old bushing out of the port and seat the replacement — no tools or wiring required. A 5-minute job that is well worth doing whenever the burner assembly is serviced.