Craftsman garage door sensors
I have a craftsman opener that will open only by holding the button on the wall. I was told that the problem was the sensors, so I got 2 sensors and wired them up only to have the same problem. They were used sensors and the sender lights up when wired and goes out when I wire the receiving sensor. Is there a way for me to test the sensors to see if they are working with out the system ?? I have power to both sides. And I put the sensors facing each other and the green light doesn't come on.
Can someone help?