If anyone has one of the newer Chamberlain or Liftmaster openers please check something and let me know.
As it’s closing, wave your foot across the center of the opening down where the safety beam is. Don’t do it near a sensor but right near the center and see if the door stops.
Here is why, mine won’t stop with a wave of a foot/leg near the center. The instructions say or show to use a box. Large objects will stop it. I have inspected no less than 8000 garage doors and never saw one with sensors fail to stop with a wave of my foot. I may not have done every one in the center though. Chamberlain has sent new sensors, nope. Now sending a circuit board. I suspect it’s a design error. Basically the beam is huge and harder to break than it should be.
Don’t test a door if you are not capable of getting out of the way. Thanks