The garage door may have looked fine in the dark, but after the spring snaps on a cold morning, it becomes heavy, stuck

https://doorspringguide004.yousher.com/garage-door-repair-for-a-broken-spring-that-overloads-your-opener-before-work

The garage door may have looked fine in the dark, but after the spring snaps on a cold morning, it becomes heavy, stuck, and clearly broken.