American Volt Adjustable Electric Radiator Fan Thermostat Switch Temperature Controller Kit Adjustable auto fan thermostat with complete installation wiring kit. Measures liquid or contact temperature and turns on electric fan. Flexible temperature turn dial controller range of 32-250'F (0-120'C). Thermostat can be wired to turn fan on or off when preset temperature is hit. Probe is pushed between radiator fins or placed inside water inlet/outlet tube.