Question Due to a lack a parts at the time, I replaced a residential dual run capacitor rated 60/3 370 volts with a 60/5 440 volt. In the long run will it damage the fan if I use a 5 mfd cap on a fan motor that normally uses a 3 mfd rating? I can't return the new $40 5 mfd cap, should I replace it with the manufacturer's OEM (another $40 3 mfd)? Thank you so much in advance.
Answer Yes you should replace the 5mfd with a 3 mfd. The voltage rating is ok since you can always replace a lower voltage rating with a higher one, but the difference between a 3mfd and a 5 mfd is 67% more. You should be within plus or minus 10% of the rating(2.7-3.3mfd) for the motor to run correctly.
