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.; ^; v' B- N+ D
0 T( d' ]2 H0 {; ~. V1 XThe sensors are located on each side of the garage door. You can manually adjust to make them align. ( z3 j( Y# B7 b 5 O4 x: v$ e5 k# p, R* T u1 _' ^My husband did exactly the same thing and fixed the issue.$ e4 H0 c& W, O" t+ E
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Hope this will help you bit. Sorry. I can't type in Chinese now.