York s1-02435929000 Air Pressure Switch 0.15 Iwc

Product Description

The YORK s1-02435929000 is a single-pole normally open (SPNO) air pressure switch rated to close on a pressure fall of 0.15 inches water column (IWC). This switch monitors airflow or pressure conditions within an HVAC system and sends a signal to the control board when the detected pressure drops to the setpoint. It is a direct OEM replacement part used in York heating and cooling equipment. Licensed HVAC technicians install this component as part of routine maintenance, fault diagnosis, or system repair when the original switch has failed or is reading incorrectly.

This air pressure switch is designed for use in residential and light commercial York HVAC systems where pressure sensing is required for safe and efficient operation. It is typically found in gas furnaces monitoring inducer or combustion air pressure, ensuring the system will not attempt ignition unless proper draft conditions are established. The SPNO configuration means the switch contacts remain open under normal conditions and close when pressure falls to 0.15 IWC, completing the control circuit.

Key Features

• Single-pole normally open (SPNO) configuration closes on pressure fall
• Setpoint of 0.15 inches water column (IWC) for precise pressure sensing
• OEM York replacement part for accurate fit and function
• Designed for use in combustion air or draft pressure monitoring circuits
• Compatible with York HVAC system control board low-voltage circuits

Compatibility

Designed as an OEM-style replacement air pressure switch for York residential and light commercial HVAC systems requiring a 0.15 IWC SPNO pressure switch.

Installation Notes

Installation should be performed by a licensed HVAC technician. Disconnect power to the unit and shut off gas supply before servicing any pressure switch or control circuit component. Verify pressure tubing connections are secure and free of cracks or blockages before completing installation. Refer to the unit wiring diagram for correct terminal identification during reconnection.

Technical Specifications

• Switch Type: Single-Pole Normally Open (SPNO)
• Pressure Setpoint: 0.15 inches water column (IWC) on fall
• Sensing Medium: Air

Standard Information

• Brand: YORK
• Manufacturer Part Number: s1-02435929000