York S1-2940-3161 Switch

The York S1-2940-3161 Fan and Limit Switch is a critical OEM replacement component designed for precise thermal regulation within HVACR systems. This reliable furnace limit control is factory-calibrated with a 105°F opening temperature and a 120°F closing temperature (105Op/120Cl), ensuring the blower fan cycles correctly to maximize airflow efficiency and prevent heat exchanger overheating. As an HVAC high-limit switch, it provides an essential safety layer by monitoring internal plenum temperatures. The York S1-2940-3161 features a robust 58 mm (2.28 in) build quality, engineered to withstand the rigorous duty cycles of industrial and residential furnace applications. Integrating this genuine York replacement part maintains the original equipment specification, supporting consistent fan timing and system safety without the need for field adjustments. For contractors, this switch ensures a direct physical and electrical match for compatible York, Luxaire, and Coleman units, reducing diagnostic time and call-backs.

• OEM Compatibility: Specifically engineered as a direct factory replacement for York furnace models, ensuring seamless mechanical fit.
• Precise Thermal Calibration: Factory-set at 105°F Open / 120°F Close for consistent blower activation and overheat protection.
• Enhanced System Safety: Functions as a high-reliability safety limit to prevent furnace operation during restricted airflow or high-heat conditions.
• Durable Construction: Built with industrial-grade materials to handle high-frequency cycling in demanding HVACR environments.

What does the 105Op/120Cl rating mean for the S1-2940-3161?
This rating indicates the specific temperature setpoints: the switch opens (breaks the circuit) at 105°F and closes (completes the circuit) at 120°F to manage fan operation and system safety.

Is this switch an automatic or manual reset limit?
The S1-2940-3161 is designed as an automatic reset limit switch, meaning it will reset itself once temperatures return to the safe operating range designated by the 120°F closing threshold.

Can I use the S1-2940-3161 in other furnace brands?
While designed for York equipment, it is compatible with various brands under the Johnson Controls umbrella, including Coleman and Luxaire, provided the temperature specifications and physical mounting match the original part.

This item is not eligible for free shipping.

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.