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The Goodman B1392139 View Port Bushing is a genuine OEM component for the Amana/Goodman AMVM970803BNAA 96% AFUE modulating variable-speed gas furnace. This bushing seats the sight-glass viewing port on the burner/inducer assembly, letting a technician inspect flame and ignition without removing the burner box. A cracked, brittle, or missing bushing lets combustion air leak and can trip the furnace on nuisance pressure-switch or flame-sense faults — replacing it restores a proper seal.
OEM vs. Generic: The genuine B1392139 is molded to the exact port diameter and high-temperature rating of the AMVM97 burner assembly, so it seals flush and resists heat cycling. Universal grommets often sit loose, degrade near the burner, and allow air leakage that skews combustion. For a sealed-combustion modulating furnace, OEM is the safe choice.
Install Difficulty: Easy (1/5). Cut power at the disconnect, remove the old bushing from the view port, and press the new bushing into place until it seats fully. No tools or recalibration required — typically a 5-minute job. Always shut off gas and power before servicing.