Definition
What is a torsion spring replacement?
A torsion spring replacement swaps the coiled spring, or pair of springs, mounted on the steel bar above your garage door opening. These springs carry the weight of the door, which is why a broken one turns an easy lift into a heavy, stuck panel. It's the most common type of garage door spring repair in Montgomery on modern homes, and it always needs a trained pair of hands.
Once a torsion spring has snapped, it can't be mended. The metal has fractured, and stretching or welding it would leave it unsafe. The fix is a new spring matched to your door's weight, height and hardware, followed by a balance test so the door lifts easily again.
The replacement is more than a part swap. A good job restores the door's counterbalance, which also protects the cables, rollers and opener from carrying loads they weren't built to handle.
Methods
How does a torsion spring lift the door?
A torsion system has four main parts. A steel shaft runs across the top of the opening, with one or two coiled springs wrapped around it. A cable drum sits at each end of the shaft, and a lift cable runs from each drum down to a bracket at the bottom corner of the door.
As the door closes, the cables unwind from the drums and the springs twist tighter, storing energy. As the door opens, the springs unwind and release that energy to help lift the door. When the stored force closely matches the door's weight, the door feels nearly weightless and the opener only has to guide it.
A winding cone at the end of each spring holds the tension, and set screws lock it to the shaft. A center bearing plate supports the middle of the shaft on a two-spring setup. Tension is adjusted with steel winding bars, and doing that wrong is how people get hurt.
If your springs run along the horizontal tracks instead of sitting on a bar above the door, you have the other common design. Our guide to extension spring replacement covers how those work.
Symptoms
8 warning signs your torsion spring is broken or failing
Torsion springs usually give some warning, but a break can also come without notice. These are the signs to watch for.
- A loud bang from the garage. This is often the moment the coil snaps.
- A visible gap in the coil. On a two-spring door, one spring may look fine while the other has broken.
- The door won't lift. By hand it feels extremely heavy.
- The door rises a few inches and stops. The opener can't carry the weight alone.
- The opener runs but the door barely moves. The motor hums or strains.
- The door closes too fast. A door that drops instead of gliding has lost its counterbalance.
- Slack lift cables. With no spring tension, the cables loosen on the drums.
- A crooked or uneven door. A tilted door can point to a cable or spring problem on one side.
Not sure which sign you're looking at? Our guide on how to tell if your garage door spring is broken walks through each one, or use the symptom checker on the full spring repair guide.
Why it happens
Why torsion springs break
Cycle fatigue is the main cause. Every open and close is one cycle, and each cycle flexes the steel a little. Over time, tiny cracks form until the coil snaps, which is why a spring that has served for years can break on an ordinary morning.
Corrosion speeds that up. Alabama's hot, humid summers promote rust on exposed coils, and rough, dry metal rubbing on itself adds friction and stress. A light coat of lubricant on the spring helps, and a spring that's visibly rusty is worth a closer look.
The wrong spring size is another cause. A spring that's too weak for the door's weight works harder on every lift, and so does a door that has gained weight from insulation, extra panels or added glass. Unbalanced doors, worn cables and dragging rollers load the spring unevenly as well.
Finally, neglect plays a part. Doors that never get a visual check or lubrication tend to show problems later and all at once.
Before you call
Safe checks to make before you call
You can gather useful information without touching the spring. These steps are safe from the floor, and they help a provider come with the right parts.
- Look at the bar above the door and note whether you have one spring or two.
- Check for a gap in the coil, and photograph it from a safe distance.
- Note whether the lift cables look slack, frayed or off their drums.
- Estimate the door size: one-car or two-car, and whether it's insulated or has windows.
- Try the wall button once only. If the door doesn't move, stop.
Never loosen the set screws, turn the winding bolts or try to lift a heavy door that has lost its spring. If the door is open, keep people and cars out from underneath it.
Step by step
What a professional torsion spring replacement involves
A trained provider follows a repeatable routine. Here's what the visit typically looks like.
- Secure the door. The door is clamped or braced so it can't move while work is under way.
- Inspect the system. Springs, cables, drums, bearings, rollers and brackets are checked for wear.
- Measure the old spring. Wire size, length, inside diameter and winding direction determine the match.
- Weigh the door. Door weight and height set the spring strength and the tension needed.
- Remove the broken spring. The cones and set screws come off and the hardware is cleaned.
- Install and wind the new spring. Winding bars set the tension in controlled turns.
- Lubricate and rebalance. The spring, bearings and rollers are lubricated and the door is tested at the halfway point.
- Test the full cycle. The door is run several times, and the opener's reverse function is checked.
Pricing
What affects the cost of torsion spring replacement
We don't publish prices, since they depend on your door and the provider. These factors move a quote.
| Factor | Why it matters |
|---|---|
| One spring or two | A pair costs more than a single spring but is the usual recommendation. |
| Wire size and length | Heavier doors need thicker or longer springs. |
| Cycle rating | Higher-cycle springs last longer and often cost more. |
| Worn hardware | Cables, drums or bearings that need replacing add parts and time. |
| Time of the call | Urgent or after-hours visits may be priced differently by some providers. |
Ask for a written estimate that lists the springs, parts and labor before work begins. For help reading one, see what affects garage door spring replacement cost. Prices vary by provider, so confirm everything before you agree.
Urgency
When a broken torsion spring is an emergency
A broken spring is an emergency when you can't safely use or secure the door. That includes a car stuck inside the garage, a door stuck open that leaves the home unsecured, and a door that dropped or is hanging crooked. It also includes any door that you can't operate at all and need to leave the property.
In those cases, keep people clear of the door and call right away. Our emergency garage door repair page lists what is safe to try while you wait.
FAQ
Torsion spring replacement FAQs
How do I know I have torsion springs and not extension springs?
Look above the door opening. Torsion springs are coils wrapped around a steel bar mounted across the top of the door. Extension springs run alongside the horizontal tracks on each side. Some doors have a single torsion spring and some have two.
Should I replace one torsion spring or both?
On a two-spring door, replacing both is the usual advice. The surviving spring has the same age and the same cycles, so it is often close behind. Matched springs also keep the door balanced, which protects the cables and opener. See our guide to what changes a spring replacement quote for questions to ask when you compare offers.
How long does a torsion spring last?
It depends on the cycle rating and how often you use the door. Many standard springs are rated around 10,000 cycles, and higher-cycle springs are available. Our guide to how long garage door springs last explains how to estimate yours. Our guide on how long garage door springs last shows how to estimate it for your own door.
Can I replace a torsion spring myself?
It isn't a safe DIY job. The spring holds a lot of stored torque, and a slipped winding bar can cause serious injury. Wrong sizing also leaves the door unbalanced and hard on the opener. It is worth leaving to a trained provider.
Will a broken torsion spring damage my opener?
It can. With no spring support the opener tries to lift the full weight of the door, which strains the motor and gears. If you suspect a broken spring, stop using the opener and read what to do about opening the door manually.
Is a torsion spring better than an extension spring?
Torsion systems generally lift the door more smoothly and keep the spring contained on the bar, which is why many homeowners ask about converting from extension springs. The right choice depends on your door and track setup, and a provider can advise after inspecting it.