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The Goodman 20197312 Air Pressure Switch is a genuine OEM safety control calibrated at -0.37 in. WC, normally open (NO), for the GMH950703BXAC high-efficiency furnace. This switch verifies proper draft-inducer airflow and venting before the furnace allows ignition, protecting your home from unsafe combustion and flue blockages.
The OEM switch is factory-calibrated to the exact -0.37" set point your furnace's control board expects, ensuring safe, code-compliant ignition sequencing. Generic switches may carry a nearby set point but small calibration differences can cause nuisance lockouts or, worse, mask a real venting problem. For a safety-critical control, OEM is strongly recommended.
Easy–Moderate (2.5/5). Replacement takes 20–40 minutes. Turn off power, photograph and disconnect the two spade terminals and the rubber sensing hose, unscrew the switch, and mount the new one. Reconnect the hose fully seated — a loose hose is the #1 cause of false pressure-switch faults.
Genuine Goodman reliability. In stock and shipping fast.