York S1-024-26099-000 Limit Switch

The York S1-024-26099-000 Limit Switch is a critical safety component engineered for high-limit temperature monitoring in residential and commercial furnace applications. This 180F M/R limit switch is designed to open the electrical circuit when the internal plenum temperature exceeds the 180-degree Fahrenheit threshold, preventing heat exchanger damage and potential fire hazards. Featuring a manual reset (M/R) mechanism, this OEM York replacement part requires a physical intervention by a technician once the limit has been tripped, ensuring that the underlying cause of the overheat—such as a failed blower motor or restricted airflow—is addressed before the system resumes operation. Built with high-grade thermoplastic housing and corrosion-resistant terminals, the S1-024-26099-000 furnace switch provides a reliable millivolt or 24V signal interface. Its compact, two-wire design allows for straightforward integration into existing safety strings, providing overheat protection that meets original equipment specifications for various York, Luxaire, and Coleman gas-fired heaters.

• Precise Thermal Cutout: Factory-calibrated to open at 180°F (82°C) to protect the heat exchanger from structural fatigue.
• Manual Safety Protocol: The manual reset limit control ensures the system remains offline until a technician inspects for airflow obstructions or mechanical failures.
• Direct OEM Compatibility: Engineered as a drop-in replacement for the S1-024-26099-000, maintaining the exact mounting footprint and electrical specs.
• Durable Construction: Features a robust thermoplastic body and high-conductivity terminals to withstand the rigors of high-static HVAC environments.

What causes this 180F limit switch to trip?
Usually, a trip is triggered by restricted airflow. Check for a dirty air filter, blocked return grilles, or a failing indoor blower motor. This HVAC safety switch opens the circuit to prevent the furnace from operating in an unsafe thermal state.

Can I replace a manual reset switch with an automatic reset version?
No. For safety and compliance, you must always use the reset type specified by the manufacturer. Replacing a manual reset furnace limit with an automatic one can lead to dangerous short-cycling and equipment failure without the root cause being identified.

Is this switch compatible with 24V and 120V circuits?
This specific York temperature limit switch is typically utilized in 24V control circuits, but always verify your specific wiring diagram and load requirements to ensure it matches the S1-024-26099-000 technical profile.

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.