I have a Craftsman 1/2 HP GDO that is about 5 years old. Recently, it
has started acting up on me.
I will not open or close on one keypress. It would go a few feet and
then simply stop. I would try again, it would go some more feet and
then stop again.
Other times, it would open almost all the way and then simply stop.
The same thing happens on the way down.
I took it apart and can see that the gears are all fine and it stops
before the carriage makes contact with the upper limit switch.
I tested adjusting the tourque to their max, but that doesn't help. I
also know its not the door itself causing the problem as the problem
repros with the emergency cable pulled.
The GDO is not flashing any fault codes either.
I'm suspecting the capacitor, rpm sensor, or the circuit board itself.
The photocells are fine and the wallmount button is fine too.
If I unplug the opener and let it sit for 10-15 minutes, it will work
fine for 5 or 6 opens, then it will start doing the same thing again.
Sometimes, it simply won't work the first time, and then will work fine
for 5 or 6 opens or closes and then stop again.