I had to replace an AFCI for a bedroom in my house built in 2004. The AFCI would trip every time I turned the ceiling fan on and then off quickly. There were two switches on the wall by the door, and upon entering the room, I would occasionally flip the wrong switch, so in stead of the light coming on, the ceiling fan was start. So i would immediately turn the fan off again. This would cause the AFCI to trip. I replaced the AFCI with another one of the same style (Siemens) and the problem disappeared. I also had another one that would often trip when the vacuum cleaner was turned on. Martin Davis July 17 2013, 9:09 am EDT
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