York S1-026-34726-001 Limit Switch

The York S1-026-34726-001 Limit Switch is a critical safety component designed for precise thermal regulation within York, Luxaire, and Coleman HVAC systems. This SPST (Single Pole Single Throw) fixed-temperature switch operates on a 110-140F automatic reset cycle, meaning it breaks the electrical circuit if the plenum temperature exceeds 140°F and restores continuity once it drops to 110°F. As a direct replacement for S1-2702-314P/A, this OEM component ensures proper furnace high limit protection and prevents heat exchanger damage caused by restricted airflow or blower motor failure. Built for 24V or 120V control circuits, the York limit switch installation is straightforward for technicians, utilizing standard spade terminals and a flush-mount flange. Maintaining correct HVAC high limit switch settings is essential for system longevity and preventing repeated furnace short cycling. This genuine York replacement part ensures your equipment maintains factory-spec safety protocols without the reliability issues associated with universal aftermarket alternatives.

• OEM Compatibility: Direct replacement for obsolete part number S1-2702-314P/A, ensuring exact fit and function.
• Automatic Reset: Eliminates the need for manual intervention by cycling the circuit at 110-140°F.
• Safety Compliance: Prevents hazardous overheating conditions in the furnace cabinet or heat exchanger.
• Durable Construction: Engineered to withstand high-cycle thermal stress in residential and light commercial units.

Common Questions

What causes a York furnace limit switch to trip frequently?
Frequent tripping is usually indicative of restricted airflow. Technicians should check for a dirty air filter, obstructed return air ducts, or a failing blower motor before replacing the limit control.

Is this switch compatible with 120V ignition systems?
Yes, the S1-026-34726-001 is designed to handle standard control voltages, but always verify your specific furnace wiring diagram to ensure correct limit switch troubleshooting.

Can I use a manual reset switch to replace this automatic model?
No. You must match the reset type specified by the manufacturer. Using a manual reset where an automatic limit switch is required can lead to improper system cycling and nuisance service calls.

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.