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. 9 a9 O5 l+ O' m 5 N! P" E; U, K0 v1 j! p9 nThe sensors are located on each side of the garage door. You can manually adjust to make them align., K+ _6 a. ?6 \/ z
/ r( j/ r( A& yMy husband did exactly the same thing and fixed the issue. % a4 c+ u5 _0 ^% O, n" ~% |+ O3 d5 D* m( p
Hope this will help you bit. Sorry. I can't type in Chinese now.