"pacca" wrote in message
...
I have lift-master garage door opener , at times when I close the door it
will reverse it self when it reaches the bottom , it's a chain drive 1/2
horse opener, any body have had this problem.Thanks
Turn the down force adjustment screw 1/4 turn clockwise. I had this already
this past week on 2 of my 3 doors, and that did the trick for both.