York S1-031-01915-000 Sensor

The York S1-031-01915-000 Supply Air Sensor is a precision 10K Ohm Type III NTC thermistor designed for high-accuracy temperature monitoring within the discharge air stream. This OEM York replacement part is critical for maintaining proper discharge air temperature control in residential and commercial split systems or rooftop units. It functions by providing real-time resistance feedback to the SE control board, allowing the system to modulate heating and cooling stages, preventing evaporator coil freeze-up or heat exchanger overheating. With a linear sensing range of -50°F to 250°F, this HVAC temperature transmitter ensures the supply air temperature stays within the design parameters for optimal energy efficiency and compressor protection. If you are seeing limit switch trips or erratic staging, verifying the resistance of this discharge air sensor against the standard 10K Type III curve is a necessary diagnostic step. Built for durability in high-velocity duct environments, this sensor is a direct-fit component for Johnson Controls and York equipment.

• Precise Monitoring: Utilizes 10K NTC thermistor technology for accurate discharge air temperature readings.
• System Protection: Critical for preventing nuisance limit trips and protecting the heat exchanger from thermal stress.
• OEM Compatibility: Genuine York S1-031-01915-000 ensures exact electrical matching and physical fitment.
• Broad Range: Engineered to operate reliably across a temperature spectrum of -50°F to 250°F.
• Efficiency Optimization: Enhances HVAC climate control by allowing the controller to maximize energy use based on real-time air conditions.

How do I test the York S1-031-01915-000 sensor?
Disconnect the sensor from the control board and use a multimeter set to the Ohms (?) scale. At 77°F (25°C), the sensor should read approximately 10,000 Ohms. Compare your reading to a standard 10K Type III resistance chart to verify accuracy.

Where is this sensor typically installed?
This is a supply air sensor, usually mounted in the supply air ductwork or the discharge plenum, positioned after the cooling coil or heat exchanger to monitor the conditioned air before it reaches the zones.

Which systems are compatible with this part?
This sensor is used extensively across York, Luxaire, and Coleman rooftop units (RTUs) and high-efficiency split systems that utilize Simplicity or Smart Equipment (SE) controls.

This item is not eligible for free shipping.

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.