Security light sensor for garage door opener has quit working.
Never had any issues with our opener (Craftsman 1/2 HP model 139.53985) until I changed the keyless entry code. New code and every other function is working correctly except the sensor beams are not tripping the light on when they are crossed. The learn light on the motor unit flashes for a bit rather than lights coming on.
This has me stumped. Read through manual a few times and the only thing somewhat related is how to extend the amount of time lights stay on after opening door.
How can I get security light to work again?
Any advice, info or remedies greatly appreciated...