When doing roller shutter fix on these sensors, you have got to be certain They may be as clear as is possible, in right alignment, and that their structural and electronic parts are not harmed. They replaced what desired sorting on two very huge shutters. Fantastic communications as well. https://rafaelljymz.pages10.com/a-secret-weapon-for-24-7-all-doors-and-roller-shutter-repairs-62567895