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The Goodman 20197310 Pressure Switch is a genuine OEM air-proving switch rated at -0.60" W.C., normally open (NO), for Goodman and Amana AMH950904CXAD 96% AFUE gas furnaces. It confirms that the inducer/draft motor is establishing proper venting before the control board allows ignition. If adequate negative pressure isn't sensed — due to a blocked flue, condensate backup, or failing inducer — the switch keeps its contacts open and safely prevents the burners from firing.
Pressure-switch setpoint accuracy is a safety function. The OEM Goodman 20197310 is factory-calibrated to the exact -0.60" W.C. trip point and matches the hose-port and mounting layout. Generic switches with a different rating or port style can cause false lockouts or, worse, allow ignition under poor draft. For this proving circuit, OEM is strongly recommended.
Easy–Moderate (2/5) — Disconnect power, transfer the wire spades and pressure hose to the new switch, and mount it in the OEM bracket. Verify the setpoint marking matches (-0.60" WC) before firing. Typical install: 10–15 minutes.
Always disconnect power before servicing. Never bypass or jumper a pressure switch — it is a critical combustion-safety control.