The Dual Activation Fan Relay is activated by both the A/C compressor and a thermostat. This relay kit functions much like the fans in a late model vehicle.
The fan is activated by the thermostat under normal conditions. However, when the A/C is turned on it will turn on the fan(s) regardless of the engine coolant temperature. This will insure proper cooling of the A/C condensor at all times. Thermostat turns on at 185 degrees and off at 170 degrees if A/C is not running.