It sounds like the photo cell’s safety beam is either blocked or out of alignment. Move any objects that may be interfering with the signal and verify that the photo-cell’s LED lights are illuminated. If the infrared beams are not blocked and the photo-cells appear that they are aligned, then contact your local garage door service technician to diagnose and repair the problem. You will not be able to close the door with the remote control transmitter until the photo-cells are working properly.
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