Last updated: July 30, 2026
Usually not. You can technically replace just one garage door spring, but on a two-spring door you almost never should. Both springs were installed at the same time and have nearly identical wear, so when one breaks, the survivor is usually weeks or months from failing too. Replacing the pair keeps the door balanced, protects the opener, and avoids paying a second service call for the second spring. The main exception is a spring that was already replaced recently on its own.
Key Takeaways
- Springs on the same door wear at the same rate — one breaking predicts the other.
- Mismatched old and new springs leave the door unbalanced, which strains the opener and cables.
- The second spring adds little to the job cost because the technician and hardware are already on site.
- Replace only one spring when the other is genuinely new (replaced within roughly the last year).
- Single-spring doors obviously get one spring — but consider upgrading to a two-spring setup for safety.
Why Springs Fail Together
Torsion springs are rated in cycles — one cycle is one open and close. A standard spring is built for about 10,000 cycles, and both springs on your door log every cycle together. By the time metal fatigue snaps one spring, its twin has the same fatigue in it. In our field experience, a surviving spring commonly fails within a few months of the first, and often much sooner once it starts carrying a different share of the load.
What Happens If You Replace Only One
A new spring and a ten-year-old spring do not pull equally. The fresh spring is at full strength while the old one is stretched and weakened, so the door lifts unevenly and the balance point drifts. That imbalance shows up as an opener working harder than designed, cables wearing on one side, and a door that feels heavy at certain points of travel. When the old spring finally breaks — and it will — you pay for a second service visit and the door is out of commission again.
Replace One vs. Replace Both
| Replace one spring | Replace both springs | |
|---|---|---|
| Upfront cost | Lower today | Modestly higher (second spring is mostly a parts cost) |
| Total cost over a year | Usually higher — second visit is likely | Lower — one visit, one trip charge |
| Door balance | Uneven; strains opener and cables | Even lift, factory-like feel |
| Risk of near-term breakdown | High — the old spring has the same fatigue | Low — both springs start at zero cycles |
| Warranty | Covers the new spring only | Covers the whole counterbalance system |
| Recommendation | Replace both springs on any two-spring door – one visit, even lift, and no repeat breakdown within months. | |
When Replacing Just One Makes Sense
There are legitimate exceptions. If one spring was already replaced on its own in the past year or so, the two springs are no longer the same age, and replacing only the older one is reasonable. Likewise, if your door uses a single torsion spring — common on lighter single-car doors — there is only one to replace. In that case it is worth asking about converting to a two-spring setup: it spreads the load, extends spring life, and keeps the door partially supported if one spring ever breaks.
Cost Considerations
Most of the price of a spring job is the service visit itself — the technician, the truck, the winding work, and the safety tune afterward. Adding the second spring while everything is already apart typically adds only the cost of the part. Compare that with paying the full visit price twice within a year, and the pair is almost always the cheaper path. Current Orange County ranges are on our spring replacement cost page.
An Orange County Example
A family in Irvine with a two-car insulated door uses the garage as the front door — six to eight cycles a day. At that usage a 10,000-cycle spring set lasts only four to five years, so both springs are heavily fatigued when the first one snaps. When we replace pairs on high-cycle households like this, we usually recommend 20,000+ cycle springs; the small upgrade cost roughly doubles the years between spring jobs.
Common Follow-Up Questions
How long does it take to replace both springs?
About an hour in most cases — replacing two springs takes barely longer than one, since the door and shaft are already disassembled.
Are high-cycle springs worth the upgrade?
For busy households, usually yes. A 20,000–25,000 cycle spring set costs modestly more but lasts roughly twice as long, which means fewer service visits over the life of the door.
How do I know if my door has one spring or two?
Look at the shaft above the closed door: you will see either one long spring in the middle or two springs meeting at a center bracket. Two is the standard for double doors.
Can I keep using the door until the second spring is replaced?
If one spring is broken, stop using the door — the remaining spring and the opener are carrying weight they were never sized for, and the door can drop. Keep it closed until repair.
Our licensed garage door technicians have been serving Orange County since 2013 and have completed more than 15,000 garage door repairs and installations across residential and commercial properties.