Greetings.

I am fairly new in this domain, so please bear with my "newbie" explanation of the problem.

We have a craftsman garage door that just stopped working one fine morning. The motor would just hum, and not do anything. At this point the door was open, and wasnt shutting.

Upon investigation, I realised that one of the wheels had come off the track.

I put this back into the track and manually closed the door (while trying to figure this out)

Now, I've checked the pulley, the trolley, the wheels, the chain slack - all "seems" fine, however, I noticed that the carriage is stuck and doesnt move with the "opener door arm".

Any ideas on how to fix this?

thanks so much in advance