Radiator Cooling Fan Temperature Sensor / Switch: Description and Operation

These models use an [1][2]A/C relay, condenser fan relay, radiator fan relay, dual pressure switch and thermoswitch to operate the condenser and radiator fans.
When the coolant temperature rises above a predetermined temperature, the thermoswitch contacts will close, turning on the radiator cooling fan. When the coolant temperature drops below a predetermined temperature, the thermoswitch contacts will open, turning off the radiator cooling fan.