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." \7 y5 O" Z. _' A/ m6 o3 W
: I# J" y9 @: ? P
The sensors are located on each side of the garage door. You can manually adjust to make them align.( x% G9 f* h% Z, _
: K3 H: l) X% W) X
My husband did exactly the same thing and fixed the issue./ H1 ~5 Y; s1 B2 d
+ S, R5 f" K/ |/ f- v: c: b
Hope this will help you bit. Sorry. I can't type in Chinese now.