York S1-024-35265-000 .55/1.2 SPNO Close On Fall Pressure Switch

Description

The York S1-024-35265-000 is a genuine OEM pressure switch engineered for reliable performance in York heating and HVAC systems. Configured as a Single Pole, Normally Open (SPNO) device, this switch is designed to close its contacts upon a fall in pressure — making it a critical safety and control component in furnace and air handler applications.

Key Features

• OEM York replacement part — ensures precise fit and function
• Single Pole, Normally Open (SPNO) switching configuration
• Close-on-fall action: contacts close when system pressure drops to the lower set point
• Dual set points: .55 and 1.2 (inches W.C.) for accurate pressure sensing
• Designed for use in York furnaces and HVAC air-handling equipment
• Serves as a safety interlock to protect against improper draft or pressure conditions

Application

This pressure switch is commonly used as a draft-proving or low-pressure safety switch in York gas furnaces and related HVAC equipment. When system pressure falls to the designated set point, the SPNO contacts close, signaling the control board to allow or interrupt operation as designed. Using a genuine York OEM part ensures compatibility, reliability, and continued warranty compliance.

Product Specifications

• Part Number: S1-024-35265-000
• Brand: York
• Switch Type: Pressure Switch
• Configuration: Single Pole, Normally Open (SPNO)
• Action: Close On Fall
• Set Points: .55 / 1.2