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.# j+ k& u1 I; z4 c' s
! ?! S/ Z8 F* ?8 [5 t/ @" N" `- v, IThe sensors are located on each side of the garage door. You can manually adjust to make them align.7 u5 ~5 r8 o: z( F2 l- r( R
( ]# ]9 t" A, ?My husband did exactly the same thing and fixed the issue.8 b' ]9 p# Q1 t; X, E8 M* }. Y; g
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Hope this will help you bit. Sorry. I can't type in Chinese now.