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.2 c g0 S' C0 x; m0 j6 ?: F
3 y3 ~/ e! G5 V W# a) l- KThe sensors are located on each side of the garage door. You can manually adjust to make them align. 7 b( h. \3 A) P7 l9 b; [) g2 j/ B6 n9 S. z
My husband did exactly the same thing and fixed the issue.' ^- C. [: D) v. _0 U- @! X {
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Hope this will help you bit. Sorry. I can't type in Chinese now.