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. ! y8 f- `+ J' k6 i( L! q) t$ T$ @6 l5 H# J
The sensors are located on each side of the garage door. You can manually adjust to make them align.9 c( J/ k" d G. @8 w5 f
3 y; G# P6 _. E+ N$ GMy husband did exactly the same thing and fixed the issue.1 a2 J! d# v1 X/ s! c
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Hope this will help you bit. Sorry. I can't type in Chinese now.