Cummins C3967250 Water Temperature Sensor

The Cummins C3967250 is a coolant temperature sensor designed for B-series and C-series diesel engines. It provides real-time engine coolant temperature data to the electronic control module (ECM) for fuel management, cold start enrichment, and fan clutch engagement. The sensor utilizes a negative temperature coefficient (NTC) thermistor element housed in a brass body with a PA66+GF30 connector. It features a 1/2 inch NPT thread for direct installation into the engine coolant passage. This sensor is critical for maintaining optimal engine operating temperature and preventing thermal damage.