York S1-373-03136-602 Limit Switch

The York S1-373-03136-602 Limit Switch is a critical safety component engineered for precise thermal protection in residential and light commercial HVAC systems. Designed as a direct OEM replacement part, this automatic reset limit switch provides essential circuit interruption to prevent heat exchanger damage or unsafe operating conditions. With a calibrated temperature range of 110 to 170 degrees Fahrenheit, it offers high-accuracy monitoring for 7 to 12-ton rooftop units and compatible furnace configurations, including model D1EG090N13046E. Featuring a 6-inch insert for optimal placement within the airflow stream, this limit control ensures rapid response to over-temperature events. Veteran technicians rely on the S1-373-03136-602 for its rugged construction and seamless integration with existing York control boards, maintaining factory-specified safety parameters without the need for field modifications. Replacing a faulty or cycling switch with this genuine York part restores system reliability and prevents nuisance tripping in high-demand environments.

• Precise Thermal Monitoring: Provides a dedicated 110°F to 170°F threshold to protect internal components from excessive heat.
• Automatic Reset Functionality: Eliminates the need for manual intervention once temperatures return to safe operating levels.
• OEM Compatibility: Specifically designed for York equipment, ensuring correct mounting and electrical terminal alignment.
• 6-Inch Insertion Depth: Extends deep into the furnace or unit cabinet to capture accurate air temperature readings.
• Rugged Industrial Build: Constructed to withstand the vibrations and thermal cycling typical of intensive HVACR applications.

What causes a limit switch like the S1-373-03136-602 to trip frequently?
Repeated tripping is usually indicative of restricted airflow, often caused by dirty 1-inch filters, a failing blower motor, or blocked return ducts. If the switch remains open after the unit cools, the internal bimetal disc may be fatigued and require replacement.

Is this switch compatible with multi-stage rooftop units?
Yes, this auxiliary limit kit is engineered for 7 to 12-ton rooftop units (RTUs). Always verify the specific temperature stamped on your existing switch to ensure it matches the 110-170F range of this component.

Can I use an aftermarket universal switch instead of the York S1-373-03136-602?
While universal switches exist, they often lack the 6-inch insert required for proper positioning in York-specific heat exchanger geometries. Using the OEM S1-373-03136-602 ensures the safety timing and temperature response remain within the manufacturer's original specification.

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.