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The Goodman 0259F00018 is a genuine OEM 12-pin wiring harness engineered for the AMH81155CNAB gas furnace and compatible Goodman/Amana models. This factory connector loom links the integrated furnace control board to the blower, igniter, and safety circuits, ensuring clean signal transfer and eliminating the intermittent faults caused by corroded, brittle, or damaged wiring.
This is the genuine OEM harness — pins, gauge, and keying match the factory connector exactly, so it seats fully without splicing or pin re-terminating. Generic universal harnesses often require cutting and crimping, which introduces failure points and can void safety certification. Choose OEM for a plug-and-play, code-compliant repair.
Easy (2/5). Disconnect power, unplug the old harness, route the new one along the original path, and reconnect. Basic tools and 15–20 minutes for most DIYers. Always shut off gas and electrical power before servicing.