I'm in a place with an old garage door, and soon after moving in, the garage door did not reliably close all the way. I adjusted the track that the end pulleys run on and it has worked for a few years now.
Sigh. And then started malfunctioning a week or so ago.
A good answer is easier with a clear question giving the make and model of everything. "The biggest problem in communication is the illusion that it has taken place." -- G. “Bernie” Shaw