Craftsman Garage Door Opener 1/2 HP
Several months ago I moved into a home with a Craftsman 1/2 HP Garage Door Opener. I don't have an owners manual. The problem I am having just started several days ago. When I attempt to open the garage door, it only goes up about 2-3 inches, then stops. If I attempt to close it at this point it goes back down then back up 2-3 inches and stops again. This happens whether I use the three button wall mount control or one of the remotes. In order to close the door I have to disengage and raise/lower it manually. The first time this happened someone suggested that it could be from the cool weather and when I got home from work that afternoon, I gave it a try and sure enough it opened and closed just fine. One week later it is doing the same thing again. It is cooler outside now but I find this hard to believe that the cool weather could cause this. Any suggestions on what might be causing the problem? I am not sure if this has anything to do with it (I never really paid any attention before) but one of the photo eyes is yellow while one is green. The green one goes out when something passes between them. The yellow one stays steady. I could have sworn they were both green before.