Craftsman garage door opener problem
I installed new springs on my garage door over the weekend. After installing them I operated the garage door opener through a complete cycle with no problem. I decided to check the safety sensors so i started the door down and put my hand in front of one of the eyes on door track and the door stopped and went right back up like was supposed to, but now when I try to lower door it only goes down about a foot and stops. Have made sure both safety eyes are solid green and when I put hand in front of beam the receiving eye goes out like supposed to. This is a Craftsman 1/2 hp chain drive, probably about 15 to 20 years old. Any suggestions?