The LEDs on both the sending and receiving sensors will glow steadily when the wiring connections and alignment are correct. NOTE: If you are unable to get the door closed and the safety sensors are the issue, the garage door can be closed by pressing and holding the door control push bar until down travel is completed. Years ago garage door openers were required to utilize safety sensors to prevent doors from closing on small children. Garage doors feature numerous moving parts and can be extremely heavy, with potential for causing significant damage or injury to pets, family members, and property. If adjustment is needed, tighten the brackets attached to the sensors.
Most garage doors use garage door sensors, also known as safety sensors, as the safety reverse mechanism. Adjust the alignment by tightening the brackets attached to the sensors. Run the opener through a complete travel cycle after each adjustment. Garage door sensors, also known as safety sensors, are the most common type of safety reversing systems. Adjust the alignment by tightening the brackets attached to the sensors.
I think the sensors were working fine until the garage door starts moving, when the electrical supply to the sensors were getting interrupted due to faulty wiring. If the door can be reasonably easily opened and closed by hand, but the opener balks at closing the door, the tension setting probably needs to be increased.
Garage Door Sensors