There are several components to garage door openers that routinely fail. The item that causes the most difficulty for most people and is the easiest to fix is when your door's "eyes" that are usually mounted at the bottom of the vertical tracks are no longer functioning. First, check to see that they have not been bumped out of alignment. Second, check to see that the lenses have not gotten dirty or an insect hasn't made a home there. If your problem seems to be somewhere else, give us a call a 864-513-1436. We'll be happy to help you to continue to troubleshoot your problem over the phone. Our phone consultations are always free.