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. . W( r3 x: _6 g- x4 G & E9 g. `: @7 SThe sensors are located on each side of the garage door. You can manually adjust to make them align., `! F7 L7 m; r/ m% ~, K
% l4 [/ M* B1 t2 c4 T( I3 M+ YMy husband did exactly the same thing and fixed the issue. $ N* }: c2 k" n* v$ y$ H- R' J; j g9 w) B5 a7 z# _7 a
Hope this will help you bit. Sorry. I can't type in Chinese now.