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. ' X% B* U$ ]8 x2 L0 H6 _ [ # M: j* y' s! _# b8 {* _The sensors are located on each side of the garage door. You can manually adjust to make them align. ) z: h0 O, x- Y7 S- _9 M$ O4 {7 p" Z6 i $ P) T3 l: N) sMy husband did exactly the same thing and fixed the issue.; z# \- x( w) S9 [0 R# [& q3 L
& i; H r, i5 z$ gHope this will help you bit. Sorry. I can't type in Chinese now.