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. % p8 L! {' V2 I b, p% ^' p6 o/ W* r. ~9 f1 n4 _; {7 T% A
The sensors are located on each side of the garage door. You can manually adjust to make them align. 7 g/ [1 X2 c% [. I. W , D3 @2 ]8 n$ Z% |! ?My husband did exactly the same thing and fixed the issue. 9 ?/ i+ X1 A' u) \& [. m 5 \- e' b2 u2 T: zHope this will help you bit. Sorry. I can't type in Chinese now.