First, the choice of "220V Cooling Fan" must be able to provide sufficient amount of exhaust (speed), under the high temperatures of the hot air inside the cooling device; when the temperature is relatively low and less when hot air is to do the opposite work.
Secondly, the "220V Cooling Fan" sensor installation should pay attention to the location of choice, the sensor is put in place, try to make the sensor can be directly clamped surface to be cooled. In operation, a temperature-controlled fan will run at a faster pace if the thermistor feel higher temperatures; and at lower temperatures, it will operate at low speed; in these higher and lower middle, "220V Cooling Fan" will hardly speed due to temperature change. When the temperature changes slow the fan, the fan speed changes are slow, will not suddenly change the fan speed and noise. The reaction time depends mainly on the length of its heat-sensing sensor sensitivity.