Quite a few garage doors come with manual locks, especially older models, for added security for your house. These typically look like a knob or handle in the middle of your door with two bars running horizontally from each side. There may be a small button on the top or side of the handle that you can press to slide the bars across the doors, thus locking the garage door from the inside. It can be somewhat easy to accidentally hit that button, especially if you’re getting large objects out of the trunk of your car near the door.
DIYers are generally steered away from working with torsion springs because installed springs are always under tension. To safely remove a torsion spring, you have to control the tension by holding the spring with a solid metal winding bar, then you loosen the spring from the rod and manually unwind the spring using two winding rods. The spring is potentially dangerous until it is fully unwound. By contrast, extension springs have little or no tension when the garage door is fully open.
A garage door with aging springs puts an enormous load on a garage door opener, so another sign of failing springs is when you hear the electric door opener begin to strain as it attempts to lift the door. At this point, it is time to consider replacing the springs. Aging door springs can also break suddenly, a situation that can cause the door to slam shut violently. If you happen to be present when a spring breaks, you will hear a very loud sound like a gunshot, because the break usually occurs when the spring is fully loaded—stretched or twisted to its full tension. When one spring breaks, the door will suddenly feel very heavy when you try to open it by hand, and an automatic garage door opener may no longer be able to lift the door at all. https://m.youtube.com/watch?feature=player_embedded&v=Z_eZc-kh40c

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.

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Annual maintenance. Make an annual check of all nuts and bolts on rails and rollers to make sure they’re firmly tightened. Check the condition of all cables to make sure they’re not worn or frayed. Lubricate rollers and springs with a garage-door lubricant (see How to Fix a Noisy Garage Door for maintenance and problem-solving tips). The door should operate smoothly and be properly balanced. Check the balance by disconnecting the opener and lowering the door halfway- the door should hold its position. If it doesn’t, adjust the spring tension or replace the springs.
Just like car tires are rated by miles, garage door springs are rated by an estimated number of cycles (1 cycle = your garage door going up AND down 1 time). The springs used by our competition range anywhere from 5,000-10,000 cycles, whereas we use a high-grade steel spring rated for 25,000-50,000 cycles! This is why we can put, in most cases, a Lifetime Guarantee on our springs for as long as you live in your home!

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The technician, Robert Helton, was very pleasant, helpful, and professional. He repaired the garage door opener expeditiously and explained why it hadn't worked properly. He also checked the chain mechanism and the door itself and showed me how to manually work the door should I need to do that in the future. I was very pleased with this repair work.

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10.8 After the cone reaches the mark, continue pulling the bar off the garage door and back toward the middle of the door with your left hand. Tighten both set screws 1/2 to 3/4 turns each after each screw first meets the shaft. This is the point at which you will feel the screw meeting resistance. If the garage door spring snakes after tightening the set screws, repeat the process and stretch the spring half as much as before. Residential torsion springs are stretched 1/8" to 1/4". Larger commercial and industrial overhead garage door torsion springs are stretched as much as an inch. http://www.youtube.com/v/Z_eZc-kh40c&feature=kp
Extension springs are long, lighter-weight springs that run perpendicular to the door and are mounted above the horizontal portions of the door tracks. These springs are tensioned by stretching out, using cables and pulleys, as with the torsion system. Because extension springs are merely suspended between two brackets (they are not mounted to a rod, like torsion springs), they must have a safety cable running through each spring. This helps contain the spring in the event of a breakage. Without the safety cable, a spring breaking under tension is a very serious safety hazard. If you have old springs that don't have safety cables, you should install them even if you aren't replacing the springs. https://m.youtube.com/v/Z_eZc-kh40c

With hundreds of moving parts that are all required to work together, it's no surprise that garage doors may need occasional repair and maintenance. Garage door repair services are also required in emergency situations, like when the garage door won't operate and the car is trapped inside or you've accidentally backed into the door when it was closed. Whether it's a specific repair of your garage door opener, a broken spring that needs to be replaced, or a bent or rusted track, The Home Depot's local, licensed service providers can get the job done quickly and efficiently.
Springs are one of the primary components in all garage door systems. Torsion springs are usually mounted horizontally over the door opening. As the door closes, cables add tension to the springs and as the door opens that tension is released. The opening of the door causes the springs to unwind in conjunction with the weight coming off the door. This achieves a natural buoyancy. However, as the door moves up and down over time and the cycle count rises, the steel in the torsion springs will grow weak and will no longer be able to create energy or lift your garage door.

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The average lifespan of torsion springs is determined by its cycle count. Garage Door Medics provides springs with an average of 25,000 cycles and we can provide custom size springs for any door. The industry standard is 10,000 cycles. When a garage door is used more frequently, the springs may not last as long. If you begin to see signs of wear, it’s time to give Garage Door Medics a call!
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