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The Goodman B1392139 View Port Bushing is a genuine OEM sight-glass grommet designed for the AMVM971005CNAA modulating variable-speed furnace and other compatible Goodman and Amana gas furnaces. This small but essential fitting seals the flame-observation port on the burner box, letting technicians safely view ignition and flame quality while keeping the combustion chamber properly enclosed. A cracked or missing bushing can allow air leakage that disrupts combustion and trips safety controls, so replacing it with the correct OEM part restores safe, sealed operation.
Our genuine OEM B1392139 is molded to exact factory tolerances for a leak-free press fit. Generic look-alikes often use lower-grade compounds that harden and crack under repeated heat cycling, leading to air leaks and premature failure. For a safety-critical combustion seal, OEM is the reliable choice.
Easy (1/5). The bushing presses into the view-port opening by hand in seconds — no tools required. Always shut off gas and power before servicing the furnace.