Garage Door Won’t Open? 8 Common Faults and How Much They Cost to Fix

ByBNW Staff

A garage door that refuses to budge is one of those problems that always seems to strike at the worst possible moment, usually as you’re heading out the door for work or trying to get the car in before it starts raining. The good news is that most faults have a clear, identifiable cause, and most are fixable without needing a brand new door. This guide walks through the most common reasons a garage door stops opening, roughly what you can expect to pay for garage door repairs, and how to tell the difference between a quick fix and a job that calls for full replacement.

Quick Diagnosis: Symptom, Likely Cause and Typical Repair Cost

Before calling anyone out, it helps to know what you’re likely dealing with. Here’s a fast overview of the most common symptoms homeowners report, matched to their probable cause and a typical UK repair cost range. These figures are a general guide only, as actual pricing depends on door type, parts required and regional labour rates.

  • Door won’t budge at all, loud bang beforehand – Broken torsion or extension spring – typically £80 to £180
  • Door partially opens then stops or reverses – Snapped or frayed lift cable – typically £60 to £120
  • Door is noisy, jerky or drops unevenly – Worn or damaged rollers – typically £15 to £40 per roller, or £80 to £150 for a full set
  • Remote or wall switch does nothing – Faulty motor or opener unit – typically £100 to £280 depending on parts
  • Door is stiff, crooked, or jams partway – Misaligned or bent tracks – typically £60 to £150
  • Handle won’t turn or door won’t lock/unlock – Broken handle or lock mechanism – typically £40 to £90
  • Automatic door won’t close, reverses on its own – Faulty or misaligned safety sensors – typically £50 to £110
  • Visible dents, cracks or warping – Structural or panel damage – typically £150 to £450 per panel

If your fault doesn’t match any of these neatly, or you’re seeing more than one symptom at once, it’s worth getting a professional health-check inspection rather than guessing, since faults often overlap and a misdiagnosis can lead to paying twice.

The 8 Most Common Garage Door Faults Explained

1. Broken Garage Door Spring

A broken spring is by far the most frequent reason a garage door won’t open, and it’s usually unmistakable. Homeowners often describe hearing a loud bang, like a gunshot, coming from the garage, followed by a door that either won’t lift at all or feels unusually heavy when you try to move it manually.

Springs do the heavy lifting, quite literally. They counterbalance the weight of the door so the motor or your own arm strength doesn’t have to bear the full load. Torsion springs sit above the door on a metal bar, while extension springs run along the tracks on either side. Both types are rated for a certain number of open and close cycles, typically somewhere between 10,000 and 15,000, so after several years of daily use, metal fatigue eventually causes them to snap.

A broken spring is one of the clearest signs you need garage door repair cost rather than a DIY fix, for reasons covered in the safety section below.

2. Garage Door Cable Snapped

Closely related to spring failure, a snapped cable often happens alongside a broken spring, though it can also fail on its own due to fraying, rust, or a cable coming off its drum. The lift cables work in tandem with the springs, guiding the door’s movement and keeping tension even on both sides.

When a cable snaps, you’ll usually notice the door hanging unevenly, one side lower than the other, or the door refusing to move past a certain point. In some cases, the door can come off its tracks entirely if a cable fails while the door is partway open. This is a genuine safety hazard, particularly for heavier sectional or up and over doors, since a door falling unexpectedly can cause serious injury or damage to a vehicle underneath.

3. Worn Rollers

Rollers guide the door along its tracks and take a surprising amount of wear over time, especially in doors that are used multiple times a day. Nylon rollers tend to wear down gradually and quietly, while steel rollers can become noisy as their bearings degrade.

Signs of worn rollers include grinding or squealing noises, the door moving unevenly, or visible wobbling as it travels. This is one of the more affordable garage door repairs on this list, and catching it early often prevents more expensive track damage later, since a roller stuck in a bent position can bend the track itself.

4. Faulty Motor or Remote (Garage Door Motor Not Working)

If nothing happens at all when you press the remote or wall switch, the issue is often electrical rather than mechanical. A garage door motor not working can be down to several things: a burnt-out motor, a tripped circuit, worn drive gears inside the opener unit, a dead remote battery, or in rarer cases, a faulty circuit board.

It’s worth ruling out the simple explanations first. Check that the unit is still plugged in, that nothing has tripped the fuse box, and that the remote batteries aren’t flat. If the motor hums but the door doesn’t move, that usually points to worn internal gears or a slipping drive belt or chain rather than the motor itself. A professional can usually diagnose this within minutes and will carry common opener parts on the van for same-day repairs.

5. Misaligned Tracks

Tracks can shift out of alignment due to a knock (a common one being a car reversing into the door), general settling of the garage structure, or loose mounting brackets that gradually work themselves free. A misaligned track puts uneven pressure on the rollers and the door panel itself, which is why this fault often shows up alongside roller wear or noisy operation.

You might notice gaps between the rollers and the track, visible bends in the track’s metal, or the door struggling and stopping at a specific point every time. Left unaddressed, misaligned tracks tend to get worse rather than better, and can eventually cause the door to jump the track entirely.

6. Broken Handles or Locks

Less dramatic than a snapped spring but still frustrating, a broken handle or lock mechanism is common on manual up and over doors, particularly older models. Locks can seize up from lack of lubrication, the internal mechanism can wear out, or the handle itself can simply snap from repeated use.

This fault won’t stop an automatic door from working via remote, but it does compromise security on manually operated doors, which is reason enough to get it sorted promptly rather than leaving the garage effectively unlockable.

7. Sensor Issues on Automatic Doors

Modern automatic garage doors rely on a pair of infrared safety sensors positioned near the bottom of the door frame. Their job is to detect obstructions and reverse the door if something, or someone, is in the way. When these sensors become misaligned, dirty, or faulty, the door may refuse to close at all, or it might close and then immediately reverse without any obvious obstruction.

This is a common call-out for households with automatic doors, and thankfully one of the simpler fixes. Sometimes it’s as basic as wiping dust or cobwebs off the sensor lenses or nudging a sensor back into alignment. Other times, a sensor unit has genuinely failed and needs replacing.

8. Structural or Panel Damage

Dents, cracks, warping and rust are the most visible faults on this list and typically result from impact damage, weather exposure, or simple age. A single dented panel on a sectional door can often be replaced without touching the rest of the door, which is considerably cheaper than replacing the whole unit. Up and over doors, being a single solid panel, are less forgiving, and significant damage may mean the whole door needs replacing rather than patching.

Why Springs and Cables Are Dangerous to DIY Repair

It’s tempting to search for a video tutorial and attempt a spring or cable repair yourself, particularly when a professional call-out feels like an added expense on top of parts. However, this is one area where the safety warnings are entirely justified.

Garage door springs, especially torsion springs, are wound under extremely high tension to support the weight of the door, which can be anywhere from 50kg to well over 150kg depending on the material and size. When a spring is released incorrectly, whether during removal or while attempting to wind a replacement, that stored energy can release violently and without warning. This has caused serious injuries, including broken bones, deep lacerations and eye injuries, even among people who considered themselves reasonably competent with tools.

Cables carry similar risk, since they’re under tension whenever the door is anywhere other than fully closed, and a cable that snaps or slips off its drum during handling can whip with considerable force. Beyond the injury risk, incorrect spring tensioning is also a leading cause of doors falling unexpectedly after a botched DIY repair, which puts anyone standing nearby, or a parked car, at risk.

Professional engineers use specialist winding bars, tension gauges and training specifically for this job, and it genuinely isn’t a corner worth cutting. This is why professional garage door repairs are positioned as a necessity rather than a preference for anything involving springs or cables, not a sales tactic.

What Repair Guarantees Should Cover, and Why It Matters

Not all garage door repairs come with the same level of protection, and this is worth checking before you book anyone out. A reputable company should offer:

  • A lifetime guarantee on replacement cables, reflecting confidence in the quality of the part and the fitting
  • A minimum 12-month guarantee on parts and labour across other repairs, covering springs, rollers, motors and sensors
  • Clear written terms, rather than a verbal promise that’s hard to enforce later

The difference between a guaranteed repair and one carried out by an uninsured tradesperson isn’t just paperwork. If a spring fails again within weeks, or a motor develops a fault after installation, a proper guarantee means the fix is free. Without one, you’re paying twice for the same problem, and you have little recourse if something goes wrong. Given the safety risks already outlined, working with an insured, guarantee-backed provider also means any accidental damage during the repair itself is covered, which an unlicensed handyman simply cannot offer.

How Fault Patterns Differ by Garage Door Type

Not every garage door fails in the same way, and the type of door you have affects both what tends to go wrong and how it gets fixed.

Up and over doors are single solid panels that pivot outward and up. They rely heavily on springs and a system of cables or a horizontal arm mechanism, which means spring and cable faults are especially common. Track misalignment also shows up frequently here, since the whole door swings on a fairly simple pivot system.

Roller doors curl up into a box above the opening and use a series of interlocking slats. Faults here tend to centre on the roller mechanism itself sticking or becoming misaligned, along with motor issues on electric models, since almost all roller doors are motorised.

Sectional doors are made of several hinged horizontal panels that travel up and back along a track into the garage ceiling. These doors have more moving parts, more hinges, more rollers, more track length, so while individual panel damage is easier to repair in isolation, there’s more that can go wrong mechanically, including hinge wear and track alignment across a longer run.

Automatic and electric doors, regardless of the underlying door type, add sensor and motor faults into the mix. These doors are more convenient day to day but introduce electronic components that simply don’t exist on manual doors, which is why sensor issues and opener faults are almost exclusively an automatic-door problem.

What to Expect From a Garage Door Repair Visit

A properly run repair visit should follow a fairly consistent structure, and knowing what to expect helps you spot a company that’s cutting corners.

  • A written quote before any work begins, so there are no surprises once the engineer is on site
  • A full health-check inspection, not just a fix for the reported symptom, since related components like springs, cables and rollers often wear together
  • Same-day parts availability for common faults, meaning engineers typically carry standard springs, cables, rollers and sensor units on the van rather than needing to order in and return on a separate visit
  • A clear explanation of the fault, so you understand what failed and why, rather than just being handed an invoice

This approach tends to catch secondary issues before they cause a second breakdown a few weeks later, which is far more cost-effective than paying for repeat call-outs.

When Repair Isn’t Worth It: Considering Replacement

Repair makes sense for the vast majority of faults covered above, but there are times when replacement is the more sensible option. If a door is more than 20 to 25 years old, parts may be difficult to source, and even if a specific fault is fixable, other components are likely close to failing too. Similarly, if the cost of repairing structural damage, such as multiple damaged panels, approaches or exceeds a significant portion of what a new door would cost, replacement usually offers better long-term value along with improved insulation, security and appearance.

A good rule of thumb is that if you’re facing your second or third major repair within a couple of years on an older door, it’s worth getting a comparison quote for replacement alongside the repair estimate.

Frequently Asked Questions

Is it worth repairing an old garage door?

In most cases, yes, provided the door’s frame and mechanism are structurally sound. A worn spring, cable or motor on a 10 to 15 year old door is usually a straightforward, affordable fix. The calculation changes once a door is significantly older, parts become harder to find, or several components are failing at once, at which point replacement often works out better over time.

How much does it cost to fix a garage door spring?

Spring replacement typically costs somewhere between £80 and £180 in the UK, depending on the spring type, the size and weight of the door, and whether both springs need replacing at once, which is often recommended even if only one has failed, since the other is usually close behind it in terms of wear.

Can I repair my own garage door?

Some minor jobs, like tightening loose bolts, lubricating hinges and rollers, or cleaning sensor lenses, are reasonably safe for a confident homeowner to handle. However, anything involving springs or cables should be left to a trained professional, given the high tension involved and the real risk of serious injury. Motor and electrical faults are also best left to an engineer, both for safety and to avoid voiding any existing warranty on the unit.

Getting Your Garage Door Back on Track

Most garage door faults, even the alarming ones like a snapped spring or a dead motor, are routine work for an experienced engineer and rarely require a full door replacement. Knowing the likely cause behind your symptoms helps you have an informed conversation when you do call someone out, and understanding which jobs carry genuine safety risk should be enough to steer anyone away from attempting a spring or cable fix solo.

If your door has stopped opening, stalled partway, or started making noises it didn’t used to make, Garage Door Rescue can send an engineer to diagnose the fault, provide a written quote, and carry out same-day garage door repairs backed by a proper guarantee on parts and labour, so you’re not left guessing whether the fix will actually hold.