USA Garage Pros
Garage Door Cable Repair
Repair and replacement of the lift cables that work with the spring system to raise and lower a sectional garage door evenly on both sides.
Cable Repair
Garage door cable repair
Lift cables run from the bottom corners of a garage door up to drums mounted on the spring shaft, working together with the springs to raise and lower the door evenly on both sides. A cable that frays, slips off its drum, or snaps changes how the door sits and moves, often causing one side to drop lower than the other.
Because cables are under tension whenever the door is closed or partway open, a broken or damaged cable is a sign the door shouldn't be used until it's been repaired. Cable repair involves replacing the affected cable, typically along with its matching cable on the other side since they wear at a similar rate, and confirming the door lifts evenly again.
Know the signs
When you need cable repair
Common symptoms
- One side of the door hangs lower than the other or the door looks crooked
- A frayed or fuzzy-looking cable near the bottom bracket
- A loud snap followed by the door dropping unevenly
- Cable visibly off its drum at the top of the door
What the service covers
- Inspection of both lift cables, drums, and bottom brackets
- Safe release of spring tension before a damaged cable is removed
- Replacement of the affected cable, typically matched on both sides
- Test of the door's balance and even travel after the repair
The process
How the work is done
- 1
Confirm the cable is the cause
Both cables, their drums, and the bottom brackets are inspected, since a similar symptom can also come from a spring or track issue.
- 2
Relieve spring tension safely
Because cables work under spring tension, that tension is safely released before a damaged cable is removed.
- 3
Replace the cable
A new cable matched to the door's size and drum is installed and seated correctly on the drum.
- 4
Rebalance and test
The door is cycled to confirm both sides lift and lower evenly and the door holds its position when partly open.
Decide
Repair or replace?
| Repair usually makes sense when… | Replacement is worth considering when… |
|---|---|
| Only the cable, and possibly its drum, need attention, with the rest of the hardware in good shape | The bottom bracket, drum, or shaft is also damaged |
| The bottom brackets and track are undamaged | Cables have failed more than once in a short period, suggesting a mismatched spring system |
Cost factors
What affects the price
Prices aren't published because they depend on your door, the parts involved and the access to the work. These are the things that move the cost — ask for the price before any work starts.
- Number of cables affected
- Both cables are often replaced together even if only one has failed, since they wear at a similar rate.
- Cause of the failure
- A cable that failed due to a drum, bracket, or roller issue may need that related part addressed too.
- Door size
- Larger, heavier doors put more load on cables and may need cables rated accordingly.
- Condition of the drums and shaft
- A damaged drum found during inspection adds to the scope.
Safety first
- Never attempt to remove, replace, or tension a garage door cable yourself — cables work under spring tension and can whip or snap suddenly.
- Do not use the door manually or with the opener once a cable has failed or looks visibly frayed; the door can drop unexpectedly on one side.
- Keep clear of the area under the door until a damaged cable has been repaired.
Safe things to check first
- From a distance, look at the door for an uneven lean or a corner sitting lower than the rest — a sign a cable may have slipped or broken.
- Look at the visible cable near the bottom bracket for fraying or broken strands without touching it, and avoid operating the door if you see this.
Answers
Frequently asked questions
What do garage door cables actually do?
They work with the springs to lift and lower the door evenly, running from the bottom corners of the door up to drums on the spring shaft.
What should I do if a cable breaks?
Stop using the door, manually or with the opener, and avoid the area underneath it until a technician has inspected and repaired it.
Can a garage door cable be replaced myself?
This isn't a safe do-it-yourself repair, since cables are under spring tension and can release suddenly if handled without the right tools and training.
Why do both cables sometimes get replaced even if only one broke?
Both cables typically see the same use and wear at a similar rate, so replacing them together helps avoid a second failure soon after.
Related
Related services
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Sources
- TDS #190 — Factors Affecting Spring Cycle Life — Door & Access Systems Manufacturers Association (DASMA) (accessed 2026-09-24)
- Government and Industry Move To Reduce Garage Door Opener Child-Entrapment Deaths — U.S. Consumer Product Safety Commission (accessed 2026-09-24)