My garage door has the same problem. I phoned Barcol and the guy told me it is a easy fix. Usually because the two sensors above the ground are not in alignment. ' D2 E* n3 h* p0 X% l6 U- o% o, ?
The sensors are located on each side of the garage door. You can manually adjust to make them align.! H7 E7 v/ z1 `8 S4 J9 Q
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My husband did exactly the same thing and fixed the issue.5 ?, T7 a" k- ?* f" \+ {
" c$ K3 Q8 Y) P# ]$ ]Hope this will help you bit. Sorry. I can't type in Chinese now.