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. & F8 m1 `7 ~6 I0 P, G / W: O) i4 H1 q! g. Q( P5 t8 u" o1 TThe sensors are located on each side of the garage door. You can manually adjust to make them align. ; k$ E/ ^# t; E# y3 Q! H* _6 u g1 J$ u1 @
My husband did exactly the same thing and fixed the issue. 6 g4 m. e5 Y% G" K( J5 n ^0 N, `
Hope this will help you bit. Sorry. I can't type in Chinese now.