On Sun, 15 Jul 2018 18:08:45 -0700 (PDT), wrote:

If you disconnect the opener at the door, can you manually open the door? Something must be holding it down causing the gear problems, but if it won't open easily manually, the new opener parts will be immediately shot to hell.


The parts DO wear out. I've rebuilt a handfull of them over the years
- all well over 10 years old - and have never rebuilt the same one
twice.