A door built around 1959 almost never has the same spring setup you'd spec for new construction. Most of these were put up with a single extension spring system or an early torsion bar mounted low on the header, and over sixty-plus winters that hardware has usually been replaced once already with whatever matched at the time - not always a clean match. Minnesota's winters are hard on steel regardless of age; the COLD-severe climate band this area sits in means lubricant stiffens, cables ice up, and springs that are already fatigued tend to let go on the coldest mornings rather than a mild one. On an older Richfield door, we check the spring cycle rating against the door's actual weight before anything else, because a lot of these were fitted with springs sized for the lighter doors that were standard decades ago, not the insulated steel doors homeowners have since swapped in. Track alignment matters more here too - original framing from this era often settled over time, so a track that was plumb in 1959 may not be plumb now, and forcing a new opener onto an out-of-square track is how you get a second service call.