As the door is opened and closed over time, the steel in the springs can start to weaken as the door gradually becomes too heavy for them, rendering them less effective. The springs will eventually break, leaving the door closed. Torsion springs can also be affected by rust and cold weather. The good news is, the average garage door torsion springs will last somewhere between 5-7 years, and should last around 10,000 cycles. So, if you open and close your garage door 3-5 times a day for over 365 days in a year, you should get plenty of life out of your torsion springs.
10.1 It is now time to wind the new springs, but before doing so, I recommend marking the shaft just beyond the winding cone. This is a final step taken to assure that you have installed the springs on the correct sides of the center bracket. Torsion springs always grow in length when they are wound in the proper direction. If your spring does not get longer as you wind it, you are winding it the wrong direction probably because it is improperly installed. We recurrently get calls about springs coming loose from the cones at about 6 turns. If this happens, switch the springs.
However, when a car is trapped inside, then it must be opened; otherwise, taking a cab or bus would be the only option left. Opening it would require help from another adult person or should be done by technicians. And every attempt in opening it, safety precautions should always be the first thing in mind. Never rely on garage entry openers when the spring is broken since it can cause falls and accidents. If the homeowner is not confident to open it or has no time to do it, it is always wise to call a technician. http://www.youtube.com/embed/Z_eZc-kh40c
Determine the inside diameter of the spring and the size of the coils. Run a tape measure across the opening at one end of the spring. Carefully measure the inside diameter of the spring so you can provide the supplier with this information. Then, use a tape measure to find the length of 10 coils on the spring. Divide the length by 10 to determine the measurement of a single coil.[7]
Slide the left spring onto the tube and add the cable drum. When your new springs arrive, put the new left spring (the 1 with the end facing up and to the left) on the torsion tube, making sure that the stationary cone on the end of the spring faces the center bracket. After sliding the new spring into place, replace the cable drum and insert the torsion bar into the left bearing bracket.[9]

Before we help you diagnose your stuck garage door, safety concerns can't be over stated. When trying to figure out how to fix a stuck garage door, it is important to take every safety precaution. Garage doors weigh hundreds of pounds and torsion springs hold a tremendous amount of energy waiting to be released, so without proper precaution it is possible to hurt yourself attempting to perform unauthorized repairs.
The national average for garage door repair cost is between $80 and $110. Some of the factors that affect your garage door repair cost are the type of springs (most often torsion or extension), the size and weight of the door, and the door material. Many garage door pros will charge a service fee to visit your house and determine the problem. Often, the service fee includes a set amount of labor. One example of this is an $80 service fee that includes the first hour of work plus testing and inspecting your garage door and garage door opener, while another pro may charge $150 for the same standard service call.    https://m.youtu.be/Z_eZc-kh40c
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