We have a Hampton Bay ceiling fan with a hand held remote. After living in this home for approx. 3 years, the fan started coming on by itself. Sometimes the light would also come on and other times the light or fan would come on by itself. We first thought the batteries in the remote might be low so we took them out, a short while later the fan started running while the batteries were out. Could be an electrical short but it has never tripped a breaker. Sometimes it will be several days before it will come on again. We thought maybe one of our neighbors bought a new remote control appliance and the remotes were on the same frequency. We asked our nearest neighbor and they had not. Could it be someone else's remote in the neighborhood?