Submitted by simon_on_trails t3_zyc1d8 in DIY
Having garage door issue. The door reverses either 1 feet from the top (95%) or midway (5%) when closing. Happens maybe 20% of the time, but when it does, trying again won't help - it reverse at the same spot. Quickfix is to manually shut it down, and then open/close and it works. Would love to fix this. Hard to troubleshoot for me because it typically do that on my way to work and I have no time to check.
I've already cleaned the sensors and everything around. The amber light is on (power?) and the green is solid green without flickering. Even if I wiggle it, it stays solid green, but if I block by hand the signal, it goes black. Almost everything I've read suggest it's a misalignment issue, but since it's solid green, hard to adjust. I tried anyway to align as best as possible by eye. It did not fix the issue. I've read somewhere it could be the sun blinding the sensor, but it happens also before sunrise. Maybe the vibration closing the door causes misalignment but I don't know what to look for. Running out of ideas on how to fix this
JerseyWiseguy t1_j24y8vz wrote
Pull the disconnect for the closer, and try opening and closing the door manually. Does it open and close smoothly at all points, and do the springs seem to be properly supporting the door? If not, it could be that the door is feeling some resistance, when trying to close (note that this can be affected by temperature extremes). In addition, you can try closing the door (with the door closer) from the inside, and watching both the door and the sensors carefully, to see if they change or have some problem during the closing process.