Radiator FansRadiator fans are electromechanical devices that are used to cool the radiator in a vehicle or other type of internal combustion engine. A radiator fan consists of a fan blade that is mounted on a motor, and is typically attached to the front of the radiator. As the engine runs, the radiator fan draws air through the radiator, helping to cool the engine and prevent overheating. Radiator fans are typically controlled by a thermostat, which turns the fan on and off as needed to maintain the desired engine temperature. In addition to cooling the engine, radiator fans can also improve the efficiency of the engine, and help to reduce emissions.