Measure the various areas where the door will be installed: door-opening height and width, headroom (from top of opening to ceiling), and back room (length of garage). For the headroom, you should have about 10" to 12" of space, depending on the spring system you're installing. For the back room, you should have the door height, plus another 18" or more of space.

Doors come with one or two torsion springs. If either spring is broken, the garage door opener may struggle to lift the weight of the door or fail to open the door at all. If a spring is broken, call a professional for service as these can be very dangerous to work with. Don’t try to open the door until a professional comes to inspect it and replace the springs. Springs can only be used for a certain number of open and close cycles, and over time they will eventually break and need replacing.


Repair Sagging Garage Doors – As doors and homes age, they can shift and move and sometimes this results in a garage door that needs to be realigned or reinforced. We will send a technician to your home to adjust the doors and to inspect the entire opening to make sure the door isn’t damaged. Once we understand the problem, we will fix the needed parts and make any adjustments to the door.
Warning! If the door is partially open and crooked, don’t touch it. Period. It’s a sign your door is off balance, and it’s usually caused by a problematic cable. It’s likely the door is still under tension from the spring, and one false move could send a 150-pound door crashing down, causing damage or injury, says Vincent Johnson, owner of Garage Door Doctor of Cypress, Texas.

With garage door installation costs, these numbers also include the actual purchase of the new door and other hardware, including the tracks, adhesives, connectors and fasteners. Keep in mind that if these numbers seem extreme, garage door replacement and upgrades can yield, on average, one of the highest returns on investments for homeowners — with an expected 85 percent.


Just like on a bike sprocket, your cables can sometimes become disengaged. Oftentimes, when a torsion spring breaks, the garage door cable will snap as a result. Sometimes, the cable will cause damage to a vehicle or wall, and if a person happens to be in the way of the cable it can cause serious harm. If you cables have snapped, you should call a professional to help you. See the video above.
If you need to leave the door open until you can make repairs, block the door track on both sides so the door can't move, and unplug the garage door opener (if you have one). If you want to close the door, you can try closing it with the opener, making sure there's nothing in the door's path in case something goes wrong. However, this will put some strain on the opener. Alternatively, you can have a few strong helpers hold the door while you disconnect it from the opener and carefully close the door manually—again, it will be very heavy.
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6.1 It is time now to unwind the old spring that is not broken. A few warnings are in order. NEVER, NEVER, NEVER touch a set screw without first inserting a properly fitting bar into the winding cone! Also, do not use box or socket wrenches for the set screws. If the cone slips, the wrench could break your hand in 10 spots before unwinding completely. It's my guess that this is the number one cause of trips to the emergency room for inexperienced homeowners fixing or replacing their springs.
We look out for the safety of our customers and their families. That’s why we do not sell garage door torsion springs separately to consumers, and it’s also why we recommend putting your broken garage door in the hands of our experienced technicians. At Garage Door Medics, we are licensed, bonded, and insured. We have completed thousands of garage door installations and spring repairs, and we make sure they are done safely and with the right springs for your garage door system.

Overhead garage doors weigh hundreds of pounds, and doors that are not properly maintained or which are equipped with older automatic garage door openers can be safety time bombs. All too common are the tragic stories of garage doors injuring or even killing children or pets who found themselves underneath a closing door. Modern automatic door openers with auto-stop and auto-reverse mechanisms have greatly reduced such accidents, but mishaps can still occur if the door and door opener are not properly maintained.
There are lots of ways your garage door can suffer damage. The tracking might be rusted or broken, the weatherstripping might need to be replaced or the door itself might actually be broken or have a hole in it. After all, garage doors are sturdy but not unbreakable. One component of your garage door in particular that will likely need replacing every so often is the spring.
These instructions were first posted in 2005, and they were updated in August of 2008. I have been frank about the hazards of garage door repairs and about my own accidents incurred while replacing torsion springs. For what it's worth, you might be surprised to know that I, too, have benefitted from producing these instructions. I have not had any garage door accidents since we first published these on the web in 2005. And, in as much as I have helped keep other DIY-ers out of the emergency room, I consider myself somewhat of a medical practitioner.
In addition to the bodily risk involved, it’s simply not an easy task. There’s the possibility that you will not install it correctly. At worst, this creates the risk that the mechanism will fail at the wrong time and injure you or someone in your family. At best, this means it will malfunction, and you’ll have to call professionals to fix it. It will save time, money and potential heartache to simply call a professional to install your new door springs correctly the first time.
Thank you A1 Garage Door Service; I thought I was getting a simple tuneup/service today BUT my project turned out to be more extensive than expected. Your technicians, Robin and Brandon, were most polite and courteous, helped in identifying the issues today. Robin was patient in explaining work that would be done, pricing. answering all my questions. Turned out work today was a complete “rebuild” on the door, new everything except the door..... Robin helped sell this to me by offering 12 month free financing for which I qualified. Work was done in rapid time and the door now operates beautifully. Thank you Robin and Brandon for coming to my rescue 🙂
If the door only goes up six inches and stops, or moves very slowly when using your remote, you could have a broken spring as well. Some customers will notice that the top section of their door is bent or that the door falls very quickly when lowering. Your door may be “crooked” or jerky when going up and down, and both of these signs indicate your torsion spring is in poor condition and very likely to break in the near future. Any time you hear a loud “popping” noise while operating, you should inspect your torsion spring immediately for signs of damage.
When you hire a professional, the first thing they will do is turn off the power as a safety precaution.  They will then measure the existing door springs to make sure the new springs they order or have in stock fit accordingly.  With these new springs, they will unwind the existing springs and install the new ones in its place, tightening them with screws.  When tightened, the springs will be balanced, lubricated and the springs will be wound up.  Lastly, the door will be tested and the tracks will be lubricated to move efficiently.
Overhead Garage Door was prompt in keeping the appointment, efficient in their work and professional when they worked on my garage door. The garage door was broken and the technician couldn’t have been nicer or quicker in getting the door repaired. I don’t know when I’ve had such good service from anyone! To add to that already wonderful service, I then received a follow up from the owner asking me about my experience and to make sure my door was working well. I highly recommend Overhead Garage Door for all of your garage door needs.
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.
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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