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. 0 v. O9 ?; Y6 A( ?. [& z N* m e+ q" h$ u" y4 {$ ^' ^# p
The sensors are located on each side of the garage door. You can manually adjust to make them align.$ m5 m n- D) X# p& E( T: Y# j
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My husband did exactly the same thing and fixed the issue. ; B- q1 \# `4 W! J- I) @! D- E ; j; a% N5 |: z+ \! ~Hope this will help you bit. Sorry. I can't type in Chinese now.