The most common mistake on a 1978-1993 door is replacing one spring on a double door and leaving the other original. The two springs age together; a mismatched pair puts uneven tension on the shaft and the new spring does twice the work until it fails early too. On these older torsion setups, both springs come off together or neither does.
Cold makes a second problem worse. In this climate band, winding a torsion spring with the wrong size bar, or skipping full winding turns in a hurry, is more likely to snap the spring or the bar itself because the steel is stiffer in low temperatures. It's not a job to rush in January.
The third way it goes sideways: an opener swap on a door with a worn track or bent rollers. The new opener masks the real problem for a few months, then struggles again because the track, not the motor, was always the issue. Fixing the opener without checking the track is a return call waiting to happen.