I got a two door garage, however one of the doors open on diferent times and days by yourself, even I change the code just in case some of my neighbours as the same but this don't work either. I live close to an Airport someody say maybe the airplanes cause the door to open by yoursef.. I don't believe it, since always is the same door (not the other), both got the same motor & model of Sears. I will appreciate any kind of information or tip on this subject.