A spring that gives out sooner than you expected
Why it happens
Springs are rated in cycles, and around 10,000 is common for a torsion spring. A door that runs many times a day uses them up fast. Near the beach, rust weakens the coils as well.
Why it matters
When a spring goes, the door suddenly feels very heavy. It won't lift, or it drops fast when you try. The opener strains and can burn out trying to do the spring's job.
Response
Tell Thom the door type when you ring, so he brings the right spring. On a two-spring door it's usually worth doing both, because they've done the same number of cycles. He checks the cables and drums while the door is apart.




