"24V DC Cooling Fan" Regular Baptist motor winding insulation paint. Fans use one or two years later, the winding insulation paint aging, the insulation strength decreased, to re-immersion insulating paint. This is done to remove the motor, under wire solder connected thereto, and to remember clearly the color of each line and the connected position, and then remove the rotor and stator, level put away "24V DC Cooling Fan" of the stator, the use of bamboo motor winding insulation paint stains on the entire motor winding insulation sucked through paint, start capacitance decreases due to turn on the fan, you can see a black square block of electronic components, then the two lines that read 3.3uf / 400v or 3.3u / 250v, to the electronic market to buy one, 3-5 yuan; for "24V DC Cooling Fan" difficult to start, fan motor may have a fever, causing the bearing oil dried up after naphthenic capacitance, preferably also add some lubricant .