I have a craftsman 1/3 hp garage door opener. I installed it myself. It opens the door fine, but will not close the door without reversing. I tried adjusting the force and lubricating the door and track, because I thought it had higher areas of friction. After those things, it still reverses. I tried the door without the opener and it practically closes by itself with no friction. Then I disengaged the opener and tried to "lower" the door. Even when the door is disengaged and it is just the chain, it reverses continually and will not close. The track is smoothe and lubricated and the force is set at the highest setting. What could be causing this? Is this a faulty opener?
Thanks for your help.