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. " R5 ~) y9 X' X3 a# c. g; e* J 1 {- r$ I# Z; G& O) L. IThe sensors are located on each side of the garage door. You can manually adjust to make them align. ) z5 ~% z7 x6 _9 f& v# H( R% Y' t4 b6 N* P. l6 d: `2 _
My husband did exactly the same thing and fixed the issue. E9 V0 p# j f/ T
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Hope this will help you bit. Sorry. I can't type in Chinese now.