If your garage door has started lifting on one side only, hanging at an angle, or you have spotted a steel cable dangling loose beside it, a cable has most likely snapped. It is a common failure and a straightforward repair, but it is one you should stop using the door for right away. This page explains why, what causes it, and what putting it right involves.
Quick answer
A garage door cable is the steel wire that works with the springs to keep the door balanced as it moves. When one snaps, the door can lift unevenly, hang crooked, or drop suddenly on one side. It is not safe to keep using. Stop, keep clear of the door, and book a repair. Cable replacement is a same-day job and typically runs $180 to $320 plus GST for a pair, often checked alongside the springs.
Is it safe to use? Short answer, no
A door with a snapped cable has lost part of what keeps it balanced. One side is still supported and the other is not, so the door can jam, twist in its tracks, or drop fast on the unsupported side. Running the opener against it makes all of that worse and can pull the door off its tracks entirely. Until it is repaired, treat the door as out of service. If your car is trapped behind it, do not try to force it open, and mention the trapped car when you call so we prioritise you.
How to tell a cable has gone
- The door lifts on one side and lags on the other, sitting at a visible angle.
- A loose steel cable is hanging down beside the door or coiled at the bottom.
- The door drops faster than usual on one side when closing.
- The door has become noticeably harder to open or gets stuck part way.
- You see fraying or rust on a cable that has not fully snapped yet, which is your warning to act before it does.
Why cables snap
Rust and corrosion
Cables are steel, and steel rusts. In Edmonton the mix of melting snow, road salt carried in on the car, and damp garage air corrodes cables faster than in a dry climate. A rusted cable loses strength and eventually gives way. This is the most common cause we see locally.
Wear at the drums and pulleys
Cables run over drums and pulleys thousands of times. Over the years they fray from that constant bending, especially if a pulley is worn or misaligned and the cable is not tracking cleanly.
A spring problem
When a spring breaks, the sudden shift in load can snap a cable at the same moment or shortly after. This is why a cable failure and a spring failure so often show up together, and why we check both when we come out.
Why cables and springs get checked together
The springs and cables are one balanced system. If a cable failed because a spring let go, replacing only the cable leaves the real problem in place and the new cable will not last. If the cable simply corroded, the springs are still worth inspecting because they have done the same years of service in the same damp conditions. Checking both on one visit is cheaper than two separate calls, and it is why we replace cables in pairs so the door pulls evenly on both sides.
What repair involves
The technician confirms the cable is the fault, inspects the springs, drums and pulleys at the same time, and fits new cables sized to your door. We replace both cables together so the door lifts squarely. Before finishing, we cycle the door and check that it sits level and travels smoothly, so you are not left with a door that still pulls to one side.
What it costs in Edmonton
Typical Edmonton market ranges below.
| Item | Typical Edmonton range | Notes |
| Cable replacement (pair) | $180 to $320 + GST | Both cables replaced together |
| Cable + spring inspection | Included | We check the whole balance system |
| Service call / diagnosis | $90 to $130 + GST | Often credited toward the repair |
Frequently asked questions
Can I just push the door up by hand and park the car?
No. With a cable gone the door is unbalanced and can drop or twist. Lifting it by hand puts you directly under that risk. Leave it and call.
One cable snapped but the other looks fine. Why replace both?
The second cable is the same age and has corroded in the same garage, so it is usually close behind. Replacing the pair keeps the door balanced and saves a second call soon after.
Could this happen again?
New cables in good condition last for years. Wiping road salt off the bottom of the door in winter and keeping the garage from getting too damp both slow corrosion and help the next set last.
Cable snapped or fraying? Stop using the door and call +1 780-908-0907 for same-day service.
