If swapping the perimeters from the door that the sensors are put in on doesn't take care of The problem (daylight will glow about the receiver sensor while in the evening now, as opposed to the early morning), we have sensor Sunshine shields accessible for ordering, part number 41B873. http://garage-door-opener-sun-sh73716.thezenweb.com/Sun-City-Garage-Door-Repair-Fundamentals-Explained-46515121