The SPAL fan controller is an accessory for your SPAL cooling fans that allows you to control when your fan turns on and off. If you are using SPAL fans for anything other than OEM replacement, then chances are you will need this controller. Engine cooling fans need some way of turning on and off, and cannot run all the time. The factory thermostat is hooked to the factory radiator cooling fan which has pre-set temperatures in which the fan turns on and off.
The SPAL controller is capable of using your current temperature sensor equipped on with your vehicle. All you need to do is set the temperature on the fan controller itself so the fans will turn on when they reach those specific temperatures. SPAL fans can also be set to a variable speed using this controller which reduces noise and vibrations. Whether you need the fan for high speed, low speed or for your AC condenser, the fan controller will work with you.
If you are using this electric fan accessory for an application not equipped with a current temperature sensor, most aftermarket temperature sensor will work, so you do not have to worry. Custom builds and vehicles need versatility and users can supply their own sensors in order to allow the SPAL fan controller to do its magic. All types of SPAL cooling fans can work with this accessory, no matter if it is going on your high performance street rod or your daily driver.