York S1-025-43289-000 Limit Switch

The York S1-025-43289-000 Limit Switch is a critical safety component designed for precise thermal management in high-performance HVACR systems. As a genuine L255F-30 Auto Limit Switch, this device is engineered to monitor furnace plenum temperatures and interrupt the electrical circuit if internal heat exceeds its 255°F set point. Upon cooling by approximately 30°F, the automatic reset capability restores operations, eliminating the need for manual intervention by the end-user. This specific OEM replacement part ensures full compatibility with York, Luxaire, and Coleman equipment, maintaining the integrity of the original system design. Built for the rigors of commercial and residential heating cycles, the York limit control utilizes a bimetallic disc for reliable snap-action switching, preventing heat exchanger damage and ensuring safe equipment shutdown during airflow failures or high-static conditions. For field technicians, this 255-degree limit switch provides a drop-in solution to restore system safety protocols with exact factory specifications.

• Precise Thermal Protection: Factory-calibrated to open at 255°F, providing a reliable failsafe against overheating.
• Automatic Reset Functionality: Resets once temperatures drop, reducing unnecessary service calls for simple over-temperature events.
• OEM Compatibility: Specifically designed for direct replacement in York, Coleman, and Luxaire units to ensure mounting and electrical alignment.
• Durable Construction: Engineered with industrial-grade materials to withstand rapid thermal cycling and high-vibration environments.
• Enhanced System Safety: Critical for protecting the heat exchanger and maintaining HVAC safety switch standards.

Is this an exact replacement for a manual reset switch?
No, the York S1-025-43289-000 is an automatic reset switch. If your existing system specifies a manual reset for regulatory or design reasons, you must use the manufacturer-recommended part number to maintain compliance.

What causes this limit switch to trip repeatedly?
Repeated tripping of an L255F-30 limit switch is typically indicative of restricted airflow, such as a clogged filter, blocked return air, a failing blower motor, or an oversized furnace for the ductwork.

Can I use this on non-York equipment?
While the 255°F thermal rating is common, you should verify the cross-reference and mounting footprint. Using an OEM replacement part like this one ensures the insertion depth and electrical ratings meet the specific requirements of the equipment.

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.