Craftsman GDO wouldn't open, can't be released!
My 1/2 HP Craftsman GDO was working fine all along, but today it will open only about one foot and stop. I pull the release lever and the door drop suddenly, yet I can not open the door manually. If I push the button, even without re-engaging, the door will open one foot and stop as before. It seems that I can not totally release the door from the opener. Do I have more than one problems? Any idea or suggestions are much appreciated.