Extension spring systems should always be restrained by a safety cable that runs through the middle of the spring, tying off to a solid point at the rear and front of the horizontal door track. Extension springs represent a hazard to bystanders when a spring, pulley, or cable breaks under tension. Metal parts from extension spring systems can suddenly be launched.

Garage Door Repair Centennial Colorado 80016

SNAP... bang... boom. That is the sound of a garage door torsion spring breaking. It can be a very loud noise that sounds like a firecracker or gunshot. Springs are rated for a certain number of cycles and are the first thing that will break in your garage door assembly. Broken springs are the #1 source of customer calls for garage door repair companies. If you have a broken spring, you should NEVER try to open the door, as it can be very dangerous. This repair should be left to a professional or someone with the right tools and skills. https://www.youtube.com/watch?feature=youtu.be&v=Z_eZc-kh40c
If you have a single-car garage, an extension spring will do the job. If you’re looking for a smoother motion and an ability to lift heavier doors, you may be better off selecting the torsion spring option. And if you have a two-car garage, your door will likely be too heavy for an extension spring. In this case, the torsion spring is the better choice.
9.4 Slide the end of the shaft into the end bearing plate. Tighten the set screws an additional 1/4 to 1/2 turns beyond the point you finger-tightened them. Add an additional 1/4 turn if you could not find the original set screw indentations in the previous step. Heavier wooden garage doors may require an additional 1/4 turn. Caution: Under-tightening the drums could cause the drum to slip and the door to cock or fall. Over-tightening the set screws could damage the shaft or drum, resulting in the same problems. This is a critical step. http://youtube.com/watch?feature=youtube_gdata&v=Z_eZc-kh40c

Although garage door springs can break during any season and at any time, they most commonly break during the winter. This has to do with the temperature change. When the temperature sinks below a specific threshold, the metal will contract. This means it’s extremely possible for your door springs to shrink slightly during the winter months. This is hard on the springs and makes them more likely to break. https://youtu.be/Z_eZc-kh40c