At witts end with my Craftsman 1/2 Garage Door Opener
I have read over many of the excellent posts and follow ups, however, I cannot seem to find the solution I am seeking. Here is my problem and what I have tried.
I had to replace the chain sprocket and plastic gear assembly. After that the door will not go down unless I continue to push the button that is wired to the opener. I am getting a 5 flash sequence on the light on the logic board. I have checked the rotating cup at the end of the shaft and it is pushed in all the way. I have checked my safety sensors and they are working. One sensor is solid green and the other is solid amber. The circuit works fine when I break the sensor beam. I can watch the travelling contactor leave the upper limit switch and after the door goes down about 1 ft, it will return to the up position. Once out of every dozen or so tries, the door will actually go down. I am baffled and could use some insight. Thank you in advance.