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The Goodman 0259M00005 is a genuine OEM gas valve adapter designed for the Amana AMVC80803BNBD two-stage, variable-speed 80% AFUE gas furnace. This adapter provides the correct threaded interface between the gas valve and the manifold assembly, ensuring a leak-free, code-compliant gas connection. Using the factory-specified adapter protects your burner tuning and keeps the furnace operating at its rated input.
Unlike generic universal fittings, this genuine Goodman OEM adapter is dimensioned to the exact manifold thread and seat used in the AMVC8 platform, eliminating cross-threading and gas-leak risk. Generic parts may require re-sealing or shimming; the OEM part drops in and seals on the first pass.
Moderate. Gas connections should be leak-tested after installation. If you are not comfortable working with gas piping, we recommend a licensed HVAC technician. Always shut off gas and power before servicing.