How can I fix my SEARS Craftsman 1/3 h.p. garage door opener?

How do I re-set my garage door opener. I have to hold the button on the wall until the door fully closes. This happened to my other opener & I had Sears come out.

He fixed it so fast I didn't see what he did to the back of the opener. I asked & he said he had re-set the unit but wouldn't tell me how. More.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.