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. 8 {6 L( L' D! Y, F9 l6 ^( [. n) u6 k- g0 f' k4 w3 E
The sensors are located on each side of the garage door. You can manually adjust to make them align. 6 M" a- }: q9 X, q! i/ t' k- M# l! B7 q
My husband did exactly the same thing and fixed the issue. & M) V9 P8 I- \. |- U3 ~; L$ g# @$ P4 C- r5 b
Hope this will help you bit. Sorry. I can't type in Chinese now.