The Torquemaster system has a lock built into each side on a double car door that will activate when a spring breaks causing the door to lock in the up position. It is very simple to deactivate this lock and get your door closed. But, you can guarantee you have a broken spring inside the Torquemaster tube on the side where the lock activated. You will need the spring inside replaced or have it converted over to a standard torsion spring set up, which is what we recommend and a service we perform quite frequently. A standard torsion spring will last 3 times longer than the small spring inside the Torquemaster tube.
Guest 9232954 -- check out the other answers for this question, and the links below the answers for even more - seems from $125-400 range from different contributors (should be replaced in pairs for balanced lifting unless one spring is quite new), about $200-250 or 300 seems a common charge. The springs themselves generally run about $20-50 each depending on lead they have to carry.

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If your garage door's spring breaks, stops working properly, or snaps, you'll lose the ability to open and close your garage door. This could happen due to a variety of issues, like normal wear and tear or from extreme temperature changes in a short amount of time. Spring replacements require a quick response from a garage door provider near you. Contact The Home Depot and a local, background-checked technician will respond within 24 hours.
10The type of garage door shown provides the necessary lift assistance with a “torque tube.” If you intend to use an opener, wait to install the tube. Otherwise, install the torque tube according to the manufacturer’s directions. Roll up the door about 4 feet to check for the alignment of the tracks, and make any adjustments. Then tighten all fasteners. 

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If you have a steel door, but want the look of a wood one, it is not necessary to change your entire garage door. Often, it may be possible to mimic the look of wood with skillful painting. Your local home improvement store may be able to provide good advice about the type of paint and brushes needed to mimic the look of wood for your particular door material.

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Does your door stop when going up? Does your look crooked? Can you see a break in the spring that runs along the side of the tracks? You might have a broken extension spring. Extension springs are generally used on smaller doors like an 8×7 or a 9×7. Extension springs are attached to the bracket that holds the horizontal track to the ceiling. The extend as the door goes down and with one broken the door cannot work properly. Typically one spring is broken and the other is not, however, we would replace both. They have both been used the same amount and springs break based off of usage. https://youtube.com/watch?feature=youtube_gdata&v=Z_eZc-kh40c
Most home centers don't carry all the replacement parts you'll need for garage door spring replacement, and most garage door service companies won't sell you springs. So you may have to order the parts online and wait for the shipment to arrive. Garagedoorpartsusa.com and stardoorparts.com are two online sources . First, inspect the condition of your cables and brackets. If you see any frayed strands on the cables or rust on the bottom brackets, replace them now before they fail. Bottom brackets cost about $15 per set. Premium-quality cables (listed as “7x19”) last much longer than economy cables and cost only about $4 more. So it's smart to buy the better cables for about $12 per set. https://m.youtube.com/watch?feature=player_embedded&v=Z_eZc-kh40c

If you have decided to replace your springs, if you are sure your door had the correct springs, and if you are ready to buy new ones, we recommend that you measure your spring or springs following the instructions in Step 4 below. Measuring springs can be difficult; most individuals, even garage door technicians, sometimes have difficulty measuring torsion springs. Ordering incorrect springs wastes time and money. http://youtube.com/v/Z_eZc-kh40c
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