The fans are controlled either with a thermostaticswitch or by the engine computer, and they turn on when the temperature of the coolant goes above a set point.
风扇要么是受一个温度控制开关控制，要么是受发动机计算机控制，当温度达到一个设定值是就会被开启。
2
In case you need to switch off the thermostatic device, simply disconnect the power supply.