The Inlet Thermistor, White, is a component used in various heating systems, including boilers and water heaters. Its primary function is to measure the temperature of the incoming water or fluid entering the system. This thermistor is typically designed to withstand the conditions found in water-based heating systems and is housed in a protective casing to prevent damage from moisture or contaminants. The data collected by the inlet thermistor is crucial for the system to regulate temperature and ensure optimal performance and efficiency.