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.7 u9 h# z" m, @) V* V
. c3 Q/ M1 `6 i: k5 N$ G& PThe sensors are located on each side of the garage door. You can manually adjust to make them align., l0 L1 A. r1 c* {; O7 \
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My husband did exactly the same thing and fixed the issue.1 W, k1 I8 V' j j9 z# Q3 P
" n n: a6 E; X; F3 f$ VHope this will help you bit. Sorry. I can't type in Chinese now.