This model is designed for unidirectional flow in the liquid line

making it suitable for both control circuits and direct motor loads

Compatible with Nest

though a clean sensor should ideally produce 2

Inspect the gasket during every annual boiler service

York S1-025-38584-000 Defrost Sensor This model is designed forThe York S1 025 38584 000 Defrost Sensor is a critical thermistor component designed for precise ambient temperature sensing in York, Luxaire, and Coleman heat pump systems. This HVAC replacement sensor monitors outdoor coil conditions to provide accurate resistance data to the integrated defrost control board, ensuring the system initiates defrost cycles only when necessary. Constructed with a high reliability thermistor bead, the S1 025 38584 000