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.$ a! F2 B+ g5 s0 A- R
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The sensors are located on each side of the garage door. You can manually adjust to make them align. ! y1 M3 L% V. s' @9 F3 } ) j _% A. Y8 B6 u# y5 N9 ZMy husband did exactly the same thing and fixed the issue. 6 l1 d! A0 L" u# m1 i3 b$ X, X# X4 ?/ z* ~/ [/ w
Hope this will help you bit. Sorry. I can't type in Chinese now.