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The 0259F00007P is a genuine OEM 12-pin wiring harness engineered for Goodman GDS80904BNA gas furnaces and compatible 80% AFUE models. This factory connector links the integrated furnace control board to key components — igniter, gas valve, blower and safety circuit — using color-coded, keyed terminals that seat only one way to eliminate miswiring during service or a board swap.
This is a genuine Goodman OEM harness. Unlike universal pigtails that require cut-and-crimp splicing, the OEM part arrives pre-terminated with the correct pin count and keying, so it drops straight onto the board and mating components. That means faster installs, no polarity guesswork, and connections that pass the furnace's built-in diagnostics on the first try.
Easy (1 of 5). Disconnect power, unplug the old harness, seat the new one until it clicks, and restore power. Most techs and confident DIYers complete this in under 15 minutes. Always shut off electrical power and gas before servicing.