York S1-025-47281-000 Temperature Defrost Thermistor Sensor

The York S1-025-47281-000 Temperature Defrost Thermistor Sensor is an essential component in HVAC systems used to measure and control the defrosting of heat exchangers. In cold weather operations, frost forms on the heat exchanger coils and reduces the efficiency of the system as well as poses a threat to the equipment. This sensor has an essential function of kicking starting the defrosting process and moderating it serving the main purpose of keeping the HVAC system at its better and longest. During the defrost cycle, it measures the temperature of the heat exchanger. When the temperature exceeds a specific limit, this means that there is ice or frost, and the sensor informs the control system to defrost.