Remember that the AC voltage must be higher than your mains voltage. You should carefully match the sections of the capacitor for the correct value. Note that capacitors often have the SAME PART NUMBER but are different values. Try lubricant or contact cleaner on those switches. The reversing switch may not have been used for several years. Switches which bind, or are very loose or are completely frozen are also common. Capacitors can go open circuit although this is far less common. If there are 2 leads the same color, as in the first picture, those leads go internally to the same point inside the capacitor and are provided to make it easy to wire.Īnalysis: Bulging capacitors are a sure sign of failure. Note carefully the capacitor leads and their colors. Often the customer will wait until nothing works. If the capacitor is a multi section unit it could be so defective that it prevents the fan from turning at all. Fans that run only one speed or two speeds most times have defective capacitors. Fans that don’t turn on are almost always a defective on-off / speed switch or a completely defective speed control capacitor. The next thing to do is to analyze the complaint. The reversing switch is not shown but is usually a double pole double throw slide switch wired to reverse the polarity presented to the “run” winding. Look at the following simplified diagrams.īoth are similar but have different capacitors. The switch selects one or more capacitors to parallel or series to vary the speed. They are non-polarized capacitors in the low micro-farad range generally from 1 to 10 mfd. One or more capacitors are used to control the speed. It is used to select the speed and may have 3, 4 or 5 leads.Ī reversing switch will reverse the connections to a motor winding which will reverse rotation direction. Most ceiling fans have the following common elements:Ī speed control switch which also turns the fan on an off.
These circuits are of several different types:Ĭapacitive controls located in the fan housing, generally 3 speedĬapacitive controls wall mounted, generally 3 speedĮlectronic controls using a triac or 2 scrs for continuously variable speed control Also worth remembering is that you may need a ladder to service the fan so while a shock from an energized fan my not kill you the fall from a ladder can cause serious injury.
Mark or lock the circuit breaker or fuse panel IF YOU CANNOT SEE IT FROM WHERE THE FAN IS. Remove the fuse, or switch the circuit breaker to OFF before servicing. REMEMBER THE FAN OPERATES AT MAINS VOLTAGE IN YOUR COUNTRY, either 120vac, 208vac, 230vac or 240vac. The troubleshooting info here will give you a good idea how to analyze the trouble and I will cover several common configurations. Popular ceiling fans come in many varieties.
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