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The Goodman 0130F00439 is the genuine OEM negative-pressure (draft-proving) switch for the ACES961005CNAA gas furnace and compatible Goodman/Amana models. Identified by its rose/pink color code, it verifies that the inducer (draft) motor is moving combustion gases properly before the control board allows ignition. If venting is blocked or the inducer fails, the switch will not close and the furnace safely refuses to fire — preventing dangerous flue-gas spillage.
Pressure-switch setpoints are precise — even a 0.1" WC difference can cause failure-to-ignite or unsafe operation. The OEM 0130F00439 is factory-calibrated to -1.27" WC with the correct port and bracket. Generic substitutes risk wrong trip points and nuisance lockouts; OEM is the safe choice.
Easy–Moderate (2/5). Power off, label and transfer the rubber hose(s) to the matching ports, move the spade connectors, and remount. About 15–20 minutes. Inspect the hose for cracks and confirm a clean ignition cycle after installation.