York S1-025-37494-000 Auto Limit Switch 170F Open 140F Close

Description

York S1-025-37494-000 Auto Reset Limit Switch

The York S1-025-37494-000 is an OEM auto reset limit switch engineered to protect York furnaces and heating systems from unsafe operating temperatures. Designed to open the control circuit at 170°F and automatically reset (close) at 140°F, this limit switch provides a critical layer of overheat protection — shutting down the burner when temperatures exceed safe thresholds and restoring normal operation once the system cools to a safe level.

Key Features

• OEM York replacement limit switch — ensures proper fit and function
• Auto reset operation — automatically closes at 140°F after opening at 170°F
• Open temperature: 170°F (77°C)
• Close temperature: 140°F (60°C)
• Protects furnace heat exchanger and components from thermal damage
• Direct OEM replacement for compatible York heating systems
• Reliable bimetal sensing element for consistent temperature response

Application

This limit switch is a direct OEM replacement for York furnaces and air handlers requiring a 170°F open / 140°F close auto reset limit. It is designed to mount in the supply air plenum or heat exchanger section and interrupt the burner circuit in the event of restricted airflow, a dirty filter, or other conditions that cause abnormal temperature rise. The auto reset feature means the unit will restore normal operation once temperatures return to safe levels — no manual intervention required.

Why Choose OEM York Parts?

Using genuine York OEM replacement parts like the S1-025-37494-000 ensures compatibility, maintains manufacturer warranty compliance, and delivers the performance your system was designed for. Aftermarket substitutes may not meet the precise temperature calibration required for safe and efficient furnace operation.