A roller garage door has fewer moving parts than most other garage door types, but it still works hard. A few cycles a day, every day of the year, adds up to thousands of movements, and eventually something wears. The good news is that most faults follow familiar patterns, and our maintenance and repair team sees the same handful again and again. This guide walks through those common roller garage door repairs: what each fault looks like, what usually causes it, and how a professional puts it right.
One thing before the detail. Two of the faults below, snapped cables and broken springs, involve parts held under serious tension. If you suspect either one, stop using the door and call a professional. Every other fault on this page is an inconvenience. Those two are a safety risk.
The Faults We Repair Most Often
The table below is the quick version. Each fault is covered in more detail further down, including the warning signs that usually appear before a full breakdown.
| Fault | What you usually notice | Keep using the door? |
|---|---|---|
| Snapped or frayed cable | Door crooked in the guides, one side dropped | No. Stop straight away |
| Broken spring | Loud bang, door very heavy, motor strains | No. Stop straight away |
| Worn spindles | New noises, uneven or wobbly rolling | Book a repair soon |
| Lock or handle fault | Stiff key, loose handle, door will not secure | Fix promptly for security |
| Remote or battery issue | Door ignores one or both handsets | Yes, once the cause is confirmed |
| Motor fault | Door will not move or stops part-way | Use the manual override if fitted |
| Safety edge fault | Door does not stop on an obstruction | Book a check promptly |
Snapped or Frayed Lifting Cables
Cable problems usually show themselves before the cable fails completely. The door starts to sit slightly crooked in its guides, one side hangs lower than the other, or you hear a scraping or grinding noise as it moves. Look closely and you may see frayed strands of steel. Once a cable snaps outright, the door often jams part-way or drops on one side.
The cause is nearly always wear. Cables flex on every single cycle, and over years of use the strands fatigue and fray, a process that damp and corrosion speed up. A professional repair replaces the damaged cables, checks the components they run through for the wear that caused the failure, and tests the door through full cycles before it goes back into service.
This is one of the two faults where the advice is blunt: stop using the door. A cable under load can let go without warning, and a door that has already dropped on one side is carrying its weight in a way it was never designed to. Leave it where it is and call a professional.
Broken Springs
A spring failure is usually unmistakable. Many customers report a single loud bang from the garage, often with nobody near the door at the time. Afterwards the door feels dramatically heavier, and an electric motor will strain, lift the curtain a few inches and then give up, or refuse to move it at all.
Springs counterbalance the weight of the door, and they work hard on every cycle. Metal fatigue builds over thousands of movements until, one day, the spring simply lets go. It is an age and usage fault rather than a sign anything was done wrong.
A professional repair replaces the broken spring with one correctly rated for the size and weight of the door, sets the tension properly and then runs the door through complete open and close cycles to confirm the balance is right. Springs store a large amount of energy even when the door is closed, which is why this is never a job for a homeowner. If you suspect a broken spring, stop using the door, avoid running the motor repeatedly against the extra weight, and call a professional.
Door misbehaving and not sure which fault you are looking at? Book a free survey and we will diagnose it properly and give you a fixed written quote, with no obligation.
Book a Free SurveyWorn Spindles
Spindle wear is the gradual one. The door gets noisier year on year, develops a rattle or a squeal it never used to have, or starts to roll unevenly, with the curtain wobbling as it travels. Because the change is slow, plenty of owners simply get used to the noise and only call when something else fails.
That is a shame, because worn spindles are one of the more straightforward repairs when caught early. The worn parts are replaced, anything else showing wear is picked up during the same inspection, and the door immediately runs quieter and smoother. Left alone, worn rotating parts make the motor work harder on every cycle and accelerate wear elsewhere, so a noisy door is worth reporting even though it still works.
Locks and Handles
On manually operated doors, and on older doors of every type, locks and handles take a lot of daily punishment. The common complaints are a key that has become stiff or will not turn, a handle that has worked loose, or a lock that no longer catches or releases cleanly.
A door that will not secure properly is a security problem, not just an annoyance, so this is a fault worth fixing promptly. We repair and upgrade locks and handles, and where a lock has worn beyond saving, a modern replacement usually improves on what was there before. It is worth adding that modern electric roller doors lock automatically when they close, which is one of the reasons many owners of older manual doors eventually upgrade rather than keep replacing hardware.
Faulty Remotes, Batteries and Motors
When an electric door stops responding, the fault sits in one of three places: the handset battery, the remote itself, or the motor. The order matters, because the most common culprit is also the cheapest. A flat battery causes a large share of the call-outs we attend, which is why doors are supplied with two remotes: if one handset still operates the door and the other does not, the battery is the likely answer.
If neither remote gets a response, the problem moves up the chain. A repair visit covers battery and remote checks first, then a proper motor assessment, so the diagnosis is based on testing rather than guesswork. Motor faults vary from minor issues to failed units, and an honest assessment tells you which you are dealing with before any decision is made. In the meantime, a door with a manual override can still be opened and closed by hand, so a motor fault does not have to leave your car trapped.
We are based at Sible Hedingham, a few minutes from Halstead, so roller garage doors in Halstead and across Braintree are right on our doorstep, and we cover the rest of Essex along with parts of Suffolk and Hertfordshire.
Safety Edge Checks
The safety edge runs along the bottom of an electric roller door. If the door meets an obstruction while closing (a bin, a bumper, a foot), the edge detects the contact and stops the door rather than letting it press on. It is the single most important safety feature on the door, which is why it gets tested as part of every repair and service visit we make.
The warning sign to watch for is a door that closes onto an object without stopping. If you ever see that happen, book a safety edge check promptly. The door may still open and close normally in every other respect, but the feature protecting people, pets and vehicles is not doing its job, and that is not something to leave until the next service.
Finally, a word on older doors. If faults are arriving one after another, there comes a point where the money is better spent on a new door than on the next repair. Our guide on when to repair or replace a garage door walks through how to make that call.