Sears garage door opener
Hello to all, need your help and advice. I recently installed a sear garage door opener. When it opens, it does not retract past the garage door top opening. I made an adjustment and now it retracts past the door opening but when I close the door, there is a gap at the bottom. It seems that any adjustments that I make will either leave a gap at the bottom when it closes or does not fully retrack on the top when it is open.
What do I do to correct this problem? Thanks for any suggestions