York S1-025-22273-003 Limit Switch

The York S1-025-22273-003 Limit Switch is a critical OEM safety component engineered for precise thermal monitoring in high-performance HVAC systems. This SPST automatic reset limit switch is calibrated to open the electrical circuit at 160°F, effectively halting operation to prevent heat exchanger damage or unsafe conditions. Once the induction or blower housing temperature stabilizes and drops to the 120°F close setpoint, the switch automatically resets to restore system functionality. Designed for high-duty cycles in residential and light commercial furnaces, this York replacement limit control ensures your equipment maintains rigorous safety parameters without the need for manual intervention after a temporary thermal event.

Key Benefits for Technicians

• Factory-Calibrated Precision: Fixed 160°F open and 120°F close setpoints eliminate the risk of setting errors during field installation.
• Seamless OEM Compatibility: Engineered specifically for York, Luxaire, and Coleman equipment, ensuring correct mounting footprints and terminal alignment.
• Automatic Reset Logic: Reduces nuisance service calls by allowing the system to recover once temperatures return to safe operating ranges.
• Enhanced System Protection: Fast-acting single pole, single throw (SPST) mechanism provides immediate response to over-limit conditions.
• Durable Construction: Built to withstand the high-temperature environment of the furnace vestibule or heat exchanger mounting points.

Common Questions

What causes a 160°F limit switch to trip frequently?
Repeated tripping usually indicates restricted airflow, often due to a clogged air filter, blocked return ducts, or a failing blower motor. If the York S1-025-22273-003 opens, first verify static pressure and temperature rise across the heat exchanger before replacing the switch.

Can I use this switch in non-York equipment?
While the 160 degree limit switch specifications are common, this is a genuine HVAC OEM part designed for specific mounting and terminal configurations. Always cross-reference the manufacturer part number to ensure the physical fit and thermal response match the original equipment's requirements.

How do I test the S1-025-22273-003 for continuity?
At room temperature, this switch is "Normally Closed." You should read near zero ohms across the terminals. If the switch shows an open circuit (OL) at room temperature, the internal contacts have failed or the switch has not yet cooled to its 120°F reset point.

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.