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.! h! a6 `3 z( }: K0 x, z
2 _0 W! _3 _4 o; u% U+ I; q% Z! @( IThe sensors are located on each side of the garage door. You can manually adjust to make them align.8 [0 ~) O D8 a6 [+ l
* c) i1 j" l$ k y) m/ R+ j! F6 o, ?My husband did exactly the same thing and fixed the issue. * f0 p4 W, R3 S: h 6 j% \5 M# T, q v! n- x0 I1 BHope this will help you bit. Sorry. I can't type in Chinese now.