York S1-024-27659-001 -0.90″wc 1/4″ Barbed SPST Pressure Switch

Description

York S1-024-27659-001 SPST Pressure Switch Overview

The York S1-024-27659-001 is an OEM replacement pressure switch engineered for reliable, precise performance in York HVAC systems. Featuring a factory-set trip point of -0.90″ water column (wc), this switch is designed to monitor negative pressure conditions — such as those found in inducer and combustion air proving circuits — and interrupt system operation if safe pressure thresholds are not met, protecting equipment and occupants alike.

Key Features

• Factory-calibrated setpoint of -0.90″ water column (wc) for accurate pressure sensing
• 1/4″ barbed port connection for secure, leak-free tubing attachment
• SPST (Single-Pole, Single-Throw) switching action for straightforward circuit integration
• OEM York replacement part — direct fit for compatible York furnace and air handler applications
• Compact design for easy installation in tight equipment compartments
• Helps protect heat exchangers and combustion systems by verifying proper draft inducer operation

Specifications

• SKU: S1-024-27659-001
• Brand: York
• Setpoint: -0.90″ wc
• Connection Type: 1/4″ barbed port
• Switch Type: SPST (Single-Pole, Single-Throw)
• Application: Pressure proving / draft inducer proving circuit

Application & Installation

This pressure switch is typically used in York gas furnaces and air handling equipment to prove that the draft inducer motor is operating correctly before allowing ignition to proceed. The 1/4″ barbed fitting connects directly to the rubber sensing hose routed from the inducer housing or collector box. As an OEM-specified component, it ensures compatibility and performance consistent with original equipment standards. Always verify the setpoint and connection size against your equipment’s service manual before installation.