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The Goodman B1392139 is a genuine OEM view-port bushing (sight-glass grommet) made for VMES800805CXAA gas furnaces and compatible Goodman/Amana models. This small but essential component seals the burner observation port, letting you safely inspect the flame while maintaining the sealed integrity of the combustion compartment.
As a genuine OEM Goodman part, this bushing is molded to the exact port diameter and rated for the temperatures found in the burner compartment. Generic grommets may not seal properly or can degrade under heat, allowing air leaks that affect combustion. The OEM piece ensures a proper, lasting seal.
Replace if the original bushing is missing, cracked, brittle, or no longer seals the sight port—common after years of heat exposure.
Very Easy (1/5). With power off, pop out the old bushing and press the new one into place—no tools required. A 5-minute job for anyone.