A fan capacitor plays a big role in making sure your fan runs efficiently and uses less electricity. In fact, most fan issues happen because of a faulty capacitor. If you are planning to buy a smart fan, a quality capacitor is a must-have for top performance. Planning to buy a new fan without spending a large amount at once? A fan capacitor plays a big role in making sure your fan runs efficiently and uses less electricity. In fact, most fan issues happen because of a faulty capacitor. If you are planning to buy a smart fan, a quality capacitor is a must-have for top performance. Planning to buy a new fan without spending a large amount at once? M&M HARIS 3.15 MFD 440V Capacitor for Ceiling Fan to Increase Speed CAN (Pack Of 2) White : Amazon.in: Home & KitchenVoltage Rating: Typically, ceiling fan capacitors are rated for 250V or 450V. It's important to match or exceed the voltage rating of the original capacitor. Tolerance: Capacitance tolerance can vary, so ensure the replacement has a similar tolerance range. Replacing a ceiling fan capacitor is a relatively simple task, but if you are not comfortable working with electrical ... Learn how to replace, wire, and choose the right fan capacitor for your AC or ceiling fan. Easy steps and pricing info for students.