A 1979 door usually came with galvanized aerospace cable wound on steel drums, and in a cold-moderate climate like this one, that wire doesn't fail from heat - it fails from repeated freeze-thaw cycling that works moisture into the strands at the bottom roller and the drum groove. You'll see the fraying start at the bracket end first, a handful of broken strands sticking out like a wire brush, long before the cable actually lets go. On the roughly 2,037 households in Pleasant Garden proper, we also see a fair number of cables that failed because a spring was replaced at some point without touching the cable - a mismatch in age between the two parts that eventually snaps the older one under new spring tension. Rust at the bottom bracket, where lawn sprinklers and grade runoff hit the door edge, is the other repeat offender here.