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The Goodman 0259A00002P 9-Pin Male Wiring Harness is a genuine OEM connector assembly for the WAHMS3636P4ACA air handler and compatible Goodman/Amana units. Use it to replace a melted, corroded, or broken control-board plug that causes intermittent operation, no-heat/no-cool faults, or error codes from poor pin contact.
The OEM harness uses the exact connector body and pin spacing your control board expects, so it locks in cleanly and carries full current without arcing. Splicing a generic harness risks loose pins, miswiring, and nuisance faults. For control circuits, the genuine plug is worth the small premium.
Easy (2/5). Unplug the failed harness, match wire colors/positions, and seat the new connector until it clicks. About 15–20 minutes. Always disconnect power and photograph the existing connections before removal.