The Davies Craig Digital Electric Water Pump & Fan Digital Controller (Part Number 8020) – has two specific functions. This unique Digital Controller will manage the operation of a Davies Craig electric water pump by varying the speed of the pump in response to the coolant temperature and manage control of your electric engine fan. The Controller has a push-button on the facia panel that offers five target temperatures: 75°C, 80°C, 85°C, 90°C and 95°C (167°, 176°, 185°, 194° and 203°F). Generally, higher engine temperature will offer improved fuel efficiency and lower engine temperature more power.