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.: T. k( j; R) c0 F, l/ @5 q
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The sensors are located on each side of the garage door. You can manually adjust to make them align. X& J- D. { v. |' W' Q1 n3 R5 y ) ~( f5 P9 [6 P5 RMy husband did exactly the same thing and fixed the issue.7 M3 K5 e. H, a* \. b/ T. a( U
5 n2 b3 ?: r$ f6 ?Hope this will help you bit. Sorry. I can't type in Chinese now.