Thermostat Switches. They perform the function of switching ON/OFF the
radiator fan for optimum efficiency of the vehicle. When the engine is
cold, they keep the radiator fan switched OFF, while when the engine
gets hot, they switch the radiator fan ON for cooling. They are
generally Bimetallic / PTC types.
ECT Switches, these
perform the dual function of a Radiator Fan thermostat switch as well
as temp. Sensor. They are applicable vehicles having a computer aided