York S1-025-37494-000 Limit

Ensure critical thermal safety in your HVAC equipment with the York S1-025-37494-000 Auto Limit Switch. This high-performance safety device is specifically engineered for precise system protection, featuring a fixed 170°F opening temperature and a 140°F closing temperature for automatic reset functionality. As a vital component for high-limit oversight, this York HVAC furnace limit switch prevents heat exchanger damage by breaking the circuit if internal plenum temperatures exceed safe operational thresholds. Designed as a direct OEM replacement part for York units like the D1NQ042D09006A and DBYP series, it integrates seamlessly into the 24V or 120V safety string. Technicians rely on the S1-025-37494-000 limit control for its robust bimetal disc construction and consistent trip accuracy. Maintain strict adherence to manufacturer specifications and ensure your system operates within designated thermal parameters with this fixed-temp limit switch. Its reliable 170F-OP 140F-CLS profile is essential for modern high-efficiency furnaces and package units requiring automatic thermal resets.

Key Benefits of the York S1-025-37494-000

• Automatic Thermal Reset: Restores circuit continuity once temperatures drop to 140°F, eliminating manual resets in hard-to-reach areas.
• Precise Safety Calibration: Factory-set 170°F trip point provides a reliable secondary safety layer against blower failure or restricted airflow.
• Broad Compatibility: Genuine York OEM part designed to meet original equipment tolerances and mounting requirements for specific D1NQ and DBYP systems.
• Professional Durability: Bimetal sensor housing is built to withstand the rigorous cycling common in heavy-duty commercial and residential HVAC applications.

Common Questions About This Limit Switch

What causes this limit switch to trip at 170°F?
In most furnace applications, a trip occurs due to restricted airflow. This is commonly caused by a dirty air filter, a failing blower motor, or obstructed return ducting, leading to the plenum overheating.

Can I use this as a substitute for a manual reset limit?
No, this is an auto-reset limit switch. It should only be used in applications where the manufacturer specifies an automatic return to operation. Substituting an auto-reset for a manual-reset safety can bypass critical safety protocols.

Is the S1-025-37494-000 compatible with other brands?
While the 170°F/140°F specs may match other switches, this component is designed for York, Coleman, and Luxaire equipment. Always verify original part numbers to ensure mounting holes and thermal sensitivity match the engineering plate.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.