American Volt 32-250'F Adjustable Dial Electric Fan Thermostat Controller 40A Relay Wiring Kit Adjustable fan thermostat complete installation wiring kit. Measures all liquid or direct contact temperatures. Flexible temperature control range of 32-250'F (0-120'C). Thermostat is wired to turn fan on when set temperature is hit. Probe can be pushed into radiator, condenser, oil cooler fins.