If you pull the red emergency release rope on your automatic opener and you still can’t lift the garage door, you probably have a broken spring. The counterbalance spring is what lifts the garage door, not the garage door opener. If the spring is broken, the door is dead weight. A garage door can be lifted, but it is going to require some muscle to get it up. It is also important to lift the door evenly so it does not jam in the tracks.
Using your drill, add tension to the torsion spring. This system uses a single spring for a double door, but many manufacturers use two springs for a double door. The painted line on the spring acts as a gauge for the number of turns you put on the spring. To keep the bar from turning while you’re adding tension, attach a locking pliers to the bar on both ends of the spring. Apply lubricant for garage doors to the spring. 

8.5 Inspect the bearing. Lube it with motor oil, spray lithium, or spray lubriplate grease. Do not use WD-40. If the shaft is worn and the bearing is seized and you can't free it, replace the bearing. Or, if you have bearings labeled "ADH" we recommend replacing them. I find very few other bearings that need to be replaced. However, if you do need to replace the bearing and you do not have a new one, you can replace it at a later date. You'll find a quick way to do this at our End Bearing Plate Replacement instruction page.
4.4 Take the spring on the left and place it at the left end of the door as pictured here. Notice that the end of the wire points to the right toward the center of the door. This is a right wind torsion spring. It will go above the garage door on the left side of the spring anchor bracket. The winding cone at the other end of this spring is usually painted red.
9.13 If you have a spring anchor bracket with a fixed steel bearing, check for wear at the point where the shaft and bearing race meet. The shaft needs to be free to slide sideways inside the bearing. File the shaft if needed. Lube the bearing. Notice that only one bearing is needed for two torsion springs. This bearing keeps the shaft from rubbing against the inside of the stationary cones and on the center bracket. Your garage door may not have a center bearing. If so grease the shaft where it will be rubbing the bracket and the insides of the cones.
Over time, the springs in your garage door can wear down and break. While the average cost to repair garage door springs is between $100 and $200, in some cases you may need to replace them instead. Replacement can cost $20-$30 for springs plus labor which can cost up to $180. Here are some signs to watch out for when determining whether repair or replacement is the right course of action:
11.2a Raise the garage door slowly. Check the door balance. If you have the correct springs the door should stay down when closed, half way when opened half way, and open when opened. If the door will drop to the floor by itself from the halfway point, add 1/4 turn of tension to each of the torsion springs. If the garage door won't stay on the floor, and if it pulls itself up when stopped halfway, close the door and remove 1/4 turn of tension from the springs.
Garage door springs support most of the weight of the door when it's opening and closing. A broken spring typically will make the door very hard to lift, rather than causing the door to stick halfway. But some spring problems can contribute to a stuck door. The springs help turn metal wheels, called pulleys, that help lift the door via vertical cables at each side of the door. A pulley can become jammed by an obstruction or possibly a misaligned or hung-up cable. Any problems with springs or pulley should be examined by a garage door professional. Springs (and pulleys) are highly tensioned and can be very dangerous to work with.
Can you find what you need in the big home improvement stores? Can they show you how to fix a broken garage spring? Do they know what tools and replacement parts you need? Do they know what safety precautions you need to take? If you have any questions during the project, can you call them for help? Have they ever actually repaired a broken garage door spring themselves?

Garage Door Repair Estimates Centennial 80015

Order replacement springs. Many manufacturers and distributors only provide torsion springs to professionals, and won’t sell them directly to the customer. Luckily, they are available on the Internet, so search online to find replacement springs. Make sure they match the coil size, length, and interior diameter of the springs you removed. Also, be sure to order both a “left-hand” and a “right-hand” spring as the coils are wound in different directions.[8]
The average cost is $190 for 2 springs in the Detroit area. This is for steel doors weighing under 140 lbs or known as a standard spring which fits 90% of all doors. The remaining 10% are wood doors or large heavy insulated doors. Expect to pay an additional $60 - $100 for a set of these. Garage Door Companies rarely carry these springs on their vehicles or stock them. Therefore, they either buy them locally at a premium or special order them. Regardless, its an additional trip that gets figured into the cost. https://www.youtube.com/v/Z_eZc-kh40c&feature=share

8.10 Double-check to make sure you have the correct wind on your new torsion spring. On the left side next to the winding cone the end of the spring wire should be pointing up if it is facing you. Notice, also, that the cone is red which usually designates right wind. Customers frequently call and explain that when they get about six turns on the springs they spin on the cones. This is due to installing the springs on the wrong sides of the center bracket.

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. http://www.youtube.com/watch?feature=youtu.be&v=Z_eZc-kh40c
I got these replacement cables for my beach house garage door after the originals rusted and broke. These are twice the diameter of the OEM cables, and fit the door perfectly. The larger cables give piece of mind for both supporting the door and providing safety cables for the extension springs. Came with all the necessary hardware, and the installation was easy with the doors blocked in the up position.