York 025-40273-004 Temperature Sensor

The York 025-40273-004 is a precision-engineered leaving water temperature sensor designed for integration with high-efficiency York chillers and HVAC systems. This thermistor-style sensor provides critical feedback to the chiller control board, allowing for accurate monitoring of evaporator leaving water temperatures. Operating with tight resistance-to-temperature curves, this component ensures the HVAC control system can prevent freeze-up conditions and maintain optimal chiller performance. It is a direct OEM York replacement part, maintaining the signal integrity required for MicroBoard and OptiView control integration. Proper installation requires ensuring a clean contact surface within the immersion well and utilizing thermal paste for maximum heat transfer. This sensor is essential for accurate BAS system integration and preventing short-cycling or low-temperature trips in commercial plant environments. By providing real-time data to the York chiller controller, the 025-40273-004 facilitates stable thermostatic control and helps sustain efficient refrigeration cycle operations throughout varying load demands.

• OEM Calibration: Pre-calibrated to match factory resistance curves for immediate York chiller troubleshooting and repair.
• Direct Fit: Eliminates site modifications with standard HVAC sensor wiring harnesses and connector pins.
• High Signal Accuracy: Minimizes temperature drift to ensure the leaving water temp sensor provides stable input for modulation.
• Durable Construction: Built to withstand the constant thermal cycling typical of commercial HVAC systems and industrial cooling applications.

What is the resistance value of the York 025-40273-004?
This sensor typically follows a standard 3k or 10k ohm thermistor curve specific to York control logic. Technicians should verify the resistance against the manufacturer’s temperature-resistance chart during diagnostic testing.

Is this sensor compatible with York OptiView control panels?
Yes, the 025-40273-004 is designed for seamless communication with OptiView and Millennium control architectures found in York YK, YT, and YR series chillers.

Can this be used for both entering and leaving water applications?
While physically similar to other immersion sensors, this part number is specifically designated for leaving water temperature monitoring. Always verify the wiring diagram in the service manual to ensure the correct control point is being addressed.

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.