York S1-025-47304-000 Defrost Thermistor Temperature Sensor

The York S1-025-47304-000 Defrost Thermistor Temperature Sensor monitors coil conditions and provides proper input for defrost control. Its element changes electrical resistance as temperature varies, allowing the control board to determine when freezing operations should begin or end in HVAC systems. The detector is secured to the designated coil position where direct temperature measurement is required for proper control logic. The sensing element supplies timely temperature feedback, supports proper defrost timing, reduces unnecessary frost accumulation, and maintains consistent communication between the sensor and the system control circuit.