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.$ I) t Z, r. _& F( M- k
* T x* n( P( o$ g3 j- jThe sensors are located on each side of the garage door. You can manually adjust to make them align.! ?# z. t( g" @
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My husband did exactly the same thing and fixed the issue." g- Q/ Q6 L2 \# _9 R* X5 m
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Hope this will help you bit. Sorry. I can't type in Chinese now.