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The Goodman 0130F00434 is a genuine OEM dual air-pressure (draft-proving) switch rated at -.67 / -1.15 in. w.c., built for the AMVC961005CNBA two-stage, variable-speed gas furnace. It verifies proper draft-inducer airflow and flue venting before the ignition sequence begins, ensuring the furnace only fires when combustion gases can be safely exhausted.
The two setpoints correspond to the furnace's low- and high-fire stages, so a single OEM assembly proves airflow across both operating modes. A failed or drifting pressure switch is one of the most common causes of no-heat and ignition lockout faults.
Draft-proving is safety-critical and setpoint-specific. The OEM 0130F00434 is factory-calibrated to the exact -.67/-1.15 in. w.c. thresholds and hose-port configuration of this furnace. Generic switches with the wrong setpoint can allow unsafe firing or cause persistent lockouts — OEM is strongly recommended here.
Power down the furnace, transfer the pressure hoses to the matching ports, move the electrical connectors, and remount with the original screws. Confirm hose routing is kink-free. Typical replacement takes 15–20 minutes.