Not sure if this is comparable but I had a problem with mine where
sometimes it would close and sometimes it would get almost all down and
then reopen. The person who installed it had mounted the light
sending/receiving units on the tracks themselves. The movement of the
tracks threw the light off sometimes, which caused the erratic
Had another company come out and they mounted the light things on the
wall with brackets, it works like a charm now.
First thing to do is disconnect the door from the opener and verify
that it moves smoothly and easily through full range of motion. The
door should be balanced so that it only takes a moderate amount of
effort and the door should pretty much stay in any position if you let
If that's all good, then it's possible the down force limit is set too
low and needs to be adjusted.