garage door won't reverse on hitting object
Installed a Craftsman 1/2 HP chain drive opener on a 8 foot wide by 7 foot high metal sectional door. The door will reverse at mid level if I grasp the door as it goes down. However, the light will not blink as it is supposed to according to the instructions. I have adjusted the down force to the max and it will not blink. At max force the door pushes up the track. I changed the max force back so that the door will reverse and the light will not blink. Now if I place the 2 x 4 on the floor and close the door the door will stop on the board and will not reverse. What should I do.