York S1-025-31830-000 Limit Switch

The York S1-025-31830-000 Limit Switch is a critical safety component designed for precise thermal regulation in commercial and residential HVAC systems. This SPDT (Single Pole Double Throw) control features a fixed setpoint calibrated to open the circuit at 105°F and close at 165°F. As a genuine York OEM replacement part, it ensures seamless integration with specific D1CG, D2CG, and D7CG rooftop units and furnace assemblies. This high temperature limit control is built for high-duty cycles, monitoring internal plenum temperatures to prevent equipment overheating and potential heat exchanger damage. Using the correct York HVAC replacement parts is vital for maintaining the 105/165 differential required by the manufacturer’s original design specifications. This temperature limit switch provides the reliability field technicians require for reducing callbacks and maintaining peak system efficiency during heavy heating cycles.

Key Benefits

• Precise Thermal Calibration: Engineered for fixed 105°F open and 165°F close operation to maintain safe furnace operating parameters.
• SPDT Switch Logic: Provides versatile wiring options for complex control circuits requiring both normally open and normally closed contacts.
• OEM Compatibility: Exact drop-in replacement for York S1-025-31830-000, ensuring standard mounting and footprint match.
• Enhanced Safety: Acts as a primary fail-safe to interrupt power to the gas valve or ignition control if temperatures exceed the safety threshold.

Common Questions

How do I confirm if this SPDT limit switch is compatible with my York unit?
Cross-reference your unit's model number (e.g., D1CG072) with the S1-025-31830-000 part number found in the technical manual. This switch is frequently utilized in 3-ton to 5-ton rooftop and packaged units.

What does the 105 Open / 165 Close rating mean for system operation?
The switch is designed to break the electrical circuit when the sensed temperature rises to 105°F and will not reset (close the circuit) until the temperature reaches 165°F. Note: In many limit switch configurations, "Open on Rise" is the safety trigger.

Can I use an aftermarket universal limit switch instead of this York OEM part?
While universal parts exist, HVAC technicians recommend this genuine York factory part to ensure the specific 105/165 thermal curve and SPDT contact rating match the original safety engineering of the appliance.

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.