First, "220V Cooling Fan" must be able to provide sufficient displacement (ie speed), in the cooling device at a high temperature of hot air, when the hot air temperature is relatively low or relatively less hot air, it is for counter to work. Secondly, when installing sensors must choose a good right position, ensure placed in the proper position. Try to make the sensor can be directly clamped to be on the surface heat. In operation, the temperature control "220V Cooling Fan", if the heating temperature is high, the regulator will feel faster, but at a lower temperature, at a lower rate, in those higher and lower intermediate low, the fan speed will be almost no change in temperature. Temperature changes slowly, change the fan, the fan speed is slow, not a sudden change "220V Cooling Fan" speed and noise when. The reaction time depends on the length of the sensor, its thermal sensitivity.