When the car "220V Cooling Fan" experience, etc. stall mode operation during low speed operation, the operating current to rise to close to the maximum current of approximately 20A. By this time, the calculation according to the heating power P = I2R, you can see the resistor power loss is proportional to the square multiples increase, so the governor will seriously heat resistance, directly melt "220V Cooling Fan" protect nearby wind in serious condition circle, most of the wind guard ring is plastic, the basic requirements of temperature must not exceed 184 ℃. Wind damage retaining ring will not only affect or damage the entire "220V Cooling Fan" system, may occur a direct result of burning car accident more severe cases.