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.: O- \" j) c" X2 b5 E+ W I
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The sensors are located on each side of the garage door. You can manually adjust to make them align.7 B. L" e( i9 x G
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My husband did exactly the same thing and fixed the issue.2 ?$ f& X# v0 ~/ A. n
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Hope this will help you bit. Sorry. I can't type in Chinese now.