Are you a Do-It-Yourself? Then, look away. Because you are not allowed to replace broken springs on a garage door without extensive repair training.
Owner, Tommy Clark, has seen people hurt themselves badly trying to fix a broken spring. A garage spring's tension has to be custom-fit to your garage's height and weight. Only trained garage techs can replace springs because there is so much torque on the spring when you wind it up to install. If the tension is off, the spring can snap and send you to the hospital.