York S1-026-32266-001 Pressure Switch

The York S1-026-32266-001 Pressure Switch is an OEM replacement part engineered for precise monitoring of the furnace drain line. Calibrated to trigger at .65-inch water column (WC), this blocked drain pressure switch is a critical safety component designed to detect restricted condensate flow in natural gas furnaces. By sensing backpressure caused by a clogged trap or blocked PVC drain line, it provides essential protection against heat exchanger flooding and water damage to the draft inducer motor or internal electronics.

For service technicians, the S1-026-32266-001 ensures a direct drop-in fit for York, Luxaire, and Coleman units, maintaining the exact factory setpoint required for safety limit circuit integrity. Replacing a faulty or stuck open pressure switch restores the furnace sequence of operation, verifying that the combustion and drainage paths are clear before ignition. This HVAC safety switch features standard spade terminals and a barbed vacuum port for simple integration into existing tubing arrays, ensuring reliable performance in high-efficiency 90% plus gas furnaces.

• OEM Compatibility: Precision-manufactured as a direct replacement part for York S1-026-32266-001, ensuring seamless fitment.
• Accurate Setpoint: Pre-calibrated .65" WC sensing ensures late-stage detection of blocked furnace drains.
• Safety Integration: Shuts down the heating cycle upon detecting industrial condensate backups to prevent component saturation.
• Durable Construction: Built to withstand the fluctuating temperatures and moisture common within high-efficiency furnace cabinets.

• What causes a "pressure switch stuck open" error code? This is often triggered by a blocked drainage system, a failing inducer motor, or a cracked vacuum hose lead. Test with a manometer to verify if the S1-026-32266-001 is receiving the required .65" WC pressure.
• Can I use a higher setpoint switch as a substitute? No. Using a switch with a different water column rating can bypass safety protocols or cause nuisance trips, potentially leading to unsafe operating conditions.
• Does this switch monitor the flue exhaust? No, this specific model is designed as a blocked drain switch, though it works in conjunction with other vacuum switches in the safety string.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.