York S1-031-01231-700 Temp Sensor

For field techs managing York, Coleman, or Luxaire equipment, the York S1-031-01231-700 Temp Sensor is a critical 10K Ohm NTC thermistor designed for precise ambient monitoring. When your outdoor unit is failing to initiate defrost or displaying erratic ambient temperature readings, this outdoor temperature sensor is the likely culprit. Featuring 36-inch leads, this OEM component provides the flexibility needed for proper positioning away from coil heat, ensuring the HVAC temperature sensor delivers accurate data to the control board to prevent system lockout. High-performance air handlers and package units rely on this sensor to modulate heating and cooling cycles efficiently. Built for durability in high-exposure environments, the S1-031-01231-700 replaces aging or shorted sensors that cause high discharge temperature faults or communication errors within York HVAC systems. Using this genuine ambient air sensor ensures the control logic maintains the correct resistance-to-temperature curve for optimal refrigerant flow and energy performance.

• OEM Compatibility: Specifically engineered for York, Luxaire, and Coleman units to ensure exact 10K Ohm resistance matching.
• 36-Inch Lead Length: Provides ample reach for professional wire routing and placement in the most accurate ambient air stream.
• Precision Control: Critical for enabling demand defrost and preventing premature system shutdowns during extreme temperature swings.
• Environmental Resilience: Encapsulated design handles moisture and UV exposure better than generic aftermarket thermistors.

• How do I test if the S1-031-01231-700 is faulty? Use an ohmmeter to check resistance; at 77°F, you should read approximately 10,000 ohms. Drastic deviations or an "open" reading indicate a failed sensor.
• Will this work with other brands? While the resistance curve may be similar, it is designed for the logic boards found in Johnson Controls-manufactured equipment (York/Coleman/Luxaire).
• What causes these sensors to fail? Most failures are due to moisture intrusion or vibration-induced wire fatigue at the sensor head.

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.