York S1-024-35760-000 Pressure Switch

For veteran technicians servicing York or Johnson Controls equipment, the York S1-024-35760-000 Pressure Switch is the reliable OEM solution for precise furnace safety and induction monitoring. This HVAC pressure limit switch is factory-calibrated to a .67" WC set point, ensuring accurate detection of air pressure differentials in the combustion blower circuit. Featuring a Single Pole Normally Open (SPNO) configuration, the contacts are designed for a close-on-fall action, which is critical for maintaining the safety loop during specific pressure drop sequences in the ignition cycle. As a genuine York replacement part, it offers exact OEM compatibility with a wide range of residential furnaces and packaged rooftop units, eliminating the mounting and calibration headaches common with universal aftermarket switches. This residential furnace pressure switch handles the high-cycle demands of modern high-efficiency systems while protecting against restricted venting or inducer motor failure.

• Precise Calibration: Factory-set at .67 inch water column to ensure strict compliance with manufacturer safety sequences.
• OEM Integrity: A direct replacement part for York, Coleman, and Luxaire systems, maintaining the original engineering specifications of the unit.
• Standard SPNO Logic: Features a Single Pole Normally Open contact form that closes on a falling pressure signal, ideal for monitoring flue gas pressure.
• Durable Construction: Engineered to withstand the thermal stresses of the furnace heat exchanger environment and high-frequency switching.
• Simplified Installation: Standard HVACR control mounting footprint and terminal connections for rapid field replacement.

What happens if the pressure switch fails to close?
If this York pressure switch remains open, the ignition control board will typically signal a lockout code, preventing the burner from firing. This is often caused by a blocked flue, a failing inducer motor, or a cracked heat exchanger.

Can I use this switch in place of a different WC rating?
No. Pressure switches are safety devices calibrated to the specific static pressure requirements of the furnace model. Always match the .67" WC rating exactly to ensure the unit operates within its safe design parameters.

How do I verify a close-on-fall operation?
Using a manometer and a multimeter, you can observe the switch action as pressure drops to the set point. The SPNO contacts should show continuity once the pressure falls to the calibrated 0.67" WC threshold.

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.