Water Temperature Sender Switch 3073787R1 Fits Case IH 395 485 584 585 685 895 3One New Aftermarket Replacement Water Temperature Sender Switch Fits Case IH and Fits International Harvester Tractors This aftermarket replacement water temperature sender switch monitors engine coolant temperature and sends a signal to the dashboard gauge, alerting the operator to overheating conditions. Also known as a water temperature transmitter or Icknield sender, it threads directly into the engine block or coolant passage using a standard M14