Hello
Hope you can help. I replaced plastic drive gear in unit and now have a unit that travels about 4 to 6 inches and immediately reverses to original position. Of interest is that sensors are not lit. When I took sending sensor and moved close to opener the green LED would light when wired to Terminal 1 and 2, yet it was wired to 2 and 3 when I took the wires off the opener (I shouldn't have in hindsight....) I cannot get the sensor to light up when wired correctly, though the LED is working when wired to 1 and 2.......
Can't see anything wrong with RPM sensor, very frustrated and mad at myself for not being able to figure it out. Door is well balanced and easy to move up and down manually. Help would be very appreciated