York S1-025-26392-704 Limit Switch

The York S1-025-26392-704 is a professional-grade SPST A/R Limit Switch designed for precise thermal regulation in York HVAC systems. Engineered for high-reliability circuit protection, this fixed-temperature limit switch operates as an automatic reset furnace switch, featuring a factory-calibrated 120°F open temperature and a 100°F close temperature. This specific 120Op 100Cl thermal switch is a critical safety component, monitoring high-limit conditions to prevent heat exchanger damage or unsafe operating temperatures within the furnace cabinet.

For field technicians and contractors, the York S1-025-26392-704 serves as a direct OEM replacement limit switch for several residential and commercial configurations, including model series BP240E54S4AAA1 and units utilizing York Control #3408465. The SPST (Single Pole Single Throw) configuration ensures a clean break in the circuit upon reaching the high-limit threshold, while the automatic reset (A/R) functionality allows the system to resume normal operation once the internal temperature drops back to 100°F. Using genuine York replacement parts ensures that the mounting footprint and electrical terminal spacing align perfectly with existing wiring harnesses, maintaining the integrity of the original safety circuit.

• Precise Thermal Calibration: Factory-set to open at 120°F and close at 100°F for consistent cycling and safety.
• OEM Compatibility: Specifically engineered to meet the specifications of York, Luxaire, and Coleman furnace models.
• Automatic Reset Logic: Eliminates the need for manual intervention by resetting once the plenum cools, reducing unnecessary service calls for simple over-temp events.
• Durable SPST Contacts: Built for high-cycle longevity in demanding residential HVAC environments.

What does A/R stand for on this York limit switch?
A/R stands for Automatic Reset. Unlike manual rollout switches, this component will automatically close the circuit and allow the furnace to restart once the temperature drops to the 100°F threshold.

Can I use this switch in place of a different temperature rating?
No. In HVAC safety circuits, you must always match the original 120Op 100Cl specifications. Using a switch with a higher opening temperature can lead to heat exchanger failure or fire hazards.

Will this work with the York BP240 series?
Yes, this switch is a confirmed compatible component for the BP240 series and other equipment referencing York Control #3408465.

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.