York S1-024-25994-000 0.50″ WC SPNO Close On Fall Pressure Switch

Description

The York S1-024-25994-000 is an OEM pressure switch engineered specifically for York HVAC systems. With a set point of 0.50″ WC (inches of water column), this Single Pole, Normally Open (SPNO) switch is designed to close its contacts when system pressure falls below the calibrated threshold — a “Close On Fall” configuration that provides reliable low-pressure safety protection for furnace and air handler applications.

This pressure switch plays a critical role in system safety and efficiency. By monitoring draft pressure or combustion airflow, it confirms proper venting and inducer operation before allowing the burner to fire, helping to prevent unsafe operating conditions and protecting heat exchanger integrity.

Key Features

• OEM York replacement pressure switch — direct factory-spec fit
• Set point: 0.50″ WC (inches of water column)
• Switch type: SPNO (Single Pole, Normally Open)
• Action: Close On Fall — contacts close when pressure drops below set point
• Designed for draft inducer and combustion air pressure monitoring
• Provides critical safety interlock to protect heat exchanger and venting system
• Built to York OEM specifications for reliable, long-term performance

Application

• Compatible with York furnaces and air handler systems requiring OEM pressure switch replacement
• Replaces worn or failed pressure switches to restore proper safety interlock function
• Ideal for HVAC technicians performing warranty or out-of-warranty service on York equipment

Why Choose OEM?

Using a genuine York OEM replacement part ensures the switch is calibrated to the exact pressure set point required by your specific equipment model. Aftermarket substitutes may not meet factory tolerances, potentially leading to nuisance lockouts or, worse, unsafe operation. Trust York S1-024-25994-000 to restore your system to factory-spec performance.