A garage door sees more daily use than almost any other mechanical component of your home. Open it twice a day, every day, and that's 730 cycles a year — 7,300 over a decade. It's not surprising that things occasionally go wrong. The question is: what do you do when they do?
The good news is that most common faults are diagnosable quickly and repairable in a single visit. The less good news is that some of them can become dangerous if mishandled. Here's what you need to know.
Problem 1: The Door Won't Open or Close
This is the most common call we receive, and the most variable — because the cause can be almost anything. Before calling an engineer, it's worth running through a quick checklist:
- Is the remote battery dead? (More common than you'd think — try the wall-mounted button instead)
- Has the manual release cord been pulled accidentally? (There's usually a red cord on the motor unit)
- Is the door physically obstructed on its tracks — debris, a buckled section, or something in the way?
- Is there power to the motor? (Check the plug and any fuses on the unit)
- Has the door come off its rollers or track?
If none of these resolve it, the fault is likely mechanical (spring, cable, or drive mechanism) or electronic (motor board, limit switches). At that point, you need an engineer.
Run through the checklist above. Check the manual release. Try the wall-mounted button if the remote isn't working.
Force the door open or closed. If there's a mechanical fault, forcing it can snap cables, damage panels, or cause injury.
Problem 2: A Broken Spring
Broken springs are one of the most common emergency call-outs, and one of the most immediately obvious — they usually announce themselves with a loud bang, like a gunshot, often early in the morning. After the bang, the door will be either immovable or dangerously heavy.
Garage door springs are the counterbalance system. They store energy when the door closes and release it when it opens, meaning the motor (or your own effort on a manual door) only has to provide a fraction of the force needed to lift the door's weight. Without a working spring, that full weight transfers directly to the mechanism — or to you.
⚠ Do not use a door with a broken spring. The door may drop suddenly and with significant force. Do not attempt to replace springs yourself — they are under extreme tension and a slip can cause serious, even fatal, injury. Always call a qualified engineer.
Springs have a finite lifespan — typically 10,000–20,000 cycles, roughly 7–14 years for an average residential door. If one spring breaks, the other is likely to follow within weeks or months. It's almost always worth replacing both at the same time to avoid a second call-out fee and the inconvenience of a repeat failure.
Cost
Spring replacement typically costs £120–£220 for a single spring, £200–£350 for a pair, including labour. See our full repair cost guide for a complete breakdown.
Problem 3: A Snapped or Frayed Cable
Lift cables run from the bottom bracket of the door up to a drum at the top, working in tandem with the springs to control the door's movement. When a cable snaps, the door will typically hang at an angle, drop suddenly on one side, or become impossible to open evenly.
Cables can snap suddenly, but they usually give warning signs first: fraying visible at the drum, a slight grinding noise during operation, or the door starting to feel uneven when opening. If you notice any of these, get the cables checked before they fail completely.
Like springs, cables should be replaced in pairs — both are the same age and see the same wear, so replacing only one is a false economy.
Visually inspect your cables every few months. Look for fraying, kinking, or rust, particularly near the bottom bracket and drum.
Try to operate the door if a cable has snapped — you risk the door dropping suddenly and damaging the door, the mechanism, or anything underneath it.
Problem 4: Safety Sensor Issues (Automated Doors)
If you have an automated garage door and it repeatedly starts to close before reversing or stopping halfway, the most likely culprit is the safety sensor system. Modern garage doors have photo-eye sensors near the base of the opening — if the beam between them is broken or obscured, the door refuses to close as a safety measure.
The good news is that sensor problems are usually simple to resolve:
- Check for visible dirt or cobwebs on the sensor lenses — wipe them clean with a dry cloth
- Check that both sensors are aligned — they should both have a solid (not blinking) light when working correctly
- Check that nothing is partially blocking the beam — a garden tool leaning against the wall, a loose threshold seal, or even a build-up of leaves
If cleaning and realignment don't resolve it, the sensor itself may need replacing (typically £80–£180 including labour), or there may be a wiring fault between the sensor and the motor unit.
Problem 5: Excessive Noise
A garage door should operate with a moderate hum and mechanical sound — not grinding, screeching, rattling, or banging. Noise is almost always a symptom of something that will worsen if ignored.
Grinding or scraping
Usually indicates worn rollers or a track alignment issue. Rollers have nylon or steel wheels that wear over time; when they degrade, the door starts to scrape against the track. Track misalignment causes the same symptoms. Both are relatively straightforward repairs.
Squeaking
Most squeaking is a lubrication issue. The moving parts of a garage door — hinges, rollers, springs, tracks — should be lubricated annually with a silicone-based spray (not WD-40, which attracts dirt). A squeak that persists after lubrication usually points to a worn component.
Rattling or vibrating
Often caused by loose hardware — bolts, nuts, and brackets work loose over time from the vibration of operation. A systematic tighten-up of all visible hardware (with a socket set, not overtightened) can resolve rattling in many cases. If the noise persists, it may be a loose motor mounting or a vibration being transmitted from the drive mechanism.
"We always say: a noisy door is telling you something. Address it early and it's usually a straightforward fix. Ignore it and you'll often end up with a more significant repair."
When To Call an Engineer
As a general rule: if the problem involves springs, cables, or the structural integrity of the door, call an engineer. These are not DIY jobs. The tension involved in a spring system can cause serious injury if mishandled, and an incorrectly repaired cable is a safety hazard.
For problems with sensors, remotes, lubrication, or loose hardware — these are often manageable yourself. But if in doubt, a call-out fee is a small price to pay for a professional diagnosis.
Our emergency repair service covers Hull, East Yorkshire, Lincolnshire and North Lincolnshire with a call-out from £30. We carry common spares and aim for same-day completion. Contact us if you're not sure whether what you're experiencing needs attention.