The most common failure on a Fairport-area house built around 1938 is a snapped or stretched extension spring, sometimes on both sides at once if the door hasn't been serviced in years. Second most common is a worn or frayed safety cable, which on these older setups is doing more of the work than it does on a torsion system, since there's no spring bar overhead absorbing the load the same way.
Cold matters here too. The service area sits in a severe cold climate band, and steel hardware that's already old gets brittler in single-digit temperatures. A spring that was hanging on through a mild fall can let go on the first hard freeze. Rollers on original tracks, if they've never been replaced, tend to bind up the same way.
Honest limitation: if your door and opener are both original to a 1938 build and the track is bent or rusted through, we're usually going to tell you replacement makes more sense than another repair. Patching old track hardware over and over costs more in the long run than doing it once.