Report "My door keeps coming up after fulling closing. I have tried adjusting the down force through it's full range until it bends the chain bar pushing down to so light it won't close at all. I have also tried backing off the down travel as far as the screw will go from all the way tight, trying every turn, and it still keeps coming up. the opener light does not flash. I have amber and green lights on my safety sensor. they work properly if I break the beam when door is coming down"