Craftsman Garage door opener operates on it's own!
I have, what I think is, a model 139.43778 (18 yrs. old) Craftsman opener. The remotes have dip switches but the motor head has none(that I can find but has a button and red light). I bought a new Chev truck and tried to program the trucks internal opener system to my door and that did not work. But, now the door opens at random. I assumed it was the truck until today I came home and found the door opened (I had the truck with me.) All other openers are without batteries.