Roller Shutter Door Not Working? 8 Common Problems and Fixes
A roller shutter door that will not open or close can bring a business to a standstill. Stock cannot move, vehicles cannot get in, and a door stuck in the open position leaves your premises unsecured overnight.
The good news is that most roller shutter door problems have a small number of common causes. This guide covers the eight most frequent faults, what usually causes them, what you can safely check yourself, and when you should stop and call a professional.
Quick answer: what to do if your roller shutter door stops working
- Stop using the door. Forcing it can turn a small fault into a costly one.
- Check the basics: power supply, remote batteries, and any visible obstruction.
- Look for obvious damage to slats, guides or the bottom rail, without touching the springs.
- Do not attempt to repair springs, shafts or the barrel yourself. These parts are under tension and can cause serious injury.
- Call a qualified technician if the basic checks do not solve the problem.
A safety warning before you start
Roller shutter doors are heavy and store a lot of energy in their springs. Every year, people are injured trying to fix doors themselves. Safe checks include looking, listening, testing the remote and checking the power supply. Anything that involves opening the barrel housing, adjusting spring tension or working on the motor should be left to a trained technician.
Our guide on the safe operation of roller shutter doors covers day-to-day safety in more detail.
1. The door will not open or close at all
Common causes
- No power to the motor
- Tripped circuit breaker or blown fuse
- Flat batteries in the remote
- Motor overheated after heavy use
- Motor or control board failure
- A door that has been locked or is still engaged on a manual lock
What you can safely check
- Is there power at the wall socket or isolator? Test with another device.
- Has the breaker tripped? Reset it once only. If it trips again, stop and call an electrician.
- Replace the remote batteries, and try the wall button or key switch to rule out the remote.
- Check that the door is not locked, and that any manual override or clutch is not engaged.
- If the motor is hot, let it cool for 20 to 30 minutes and try again.
When to call a professional
If the door still does not respond, the problem is likely the motor, control board, limit switches or wiring. In South Africa, electrical work should be done by a qualified person. See our post on commercial electrical services if the fault is in the building supply rather than the door.
2. The door is stuck halfway or stops mid-travel
Common causes
- Slats jammed in the guide rails
- Debris, dirt or a foreign object in the guides
- Bent or damaged guides
- Incorrect limit settings
- A safety edge or sensor being triggered
- A worn or weak motor struggling with the load
What you can safely check
- Look for objects, dirt or debris in the guide rails and clear them, with the door isolated from power.
- Check whether a safety edge or photocell beam is blocked or misaligned.
- Look for slats that have popped out of the guides.
When to call a professional
Bent guides, damaged slats and limit resets need proper tools and experience. Running a jammed door repeatedly can burn out the motor.
3. The door is very noisy
Some sound is normal, but grinding, screeching or banging usually means something needs attention.
Common causes
- Lack of lubrication on the guides, shaft or bearings
- Worn bearings or bushes
- Loose fixings or brackets
- Slats rubbing against the guides
- A worn motor gearbox
What you can safely check
- Listen to where the noise comes from: the sides, the top or the motor.
- Look for loose bolts or brackets and report them to your technician.
When to call a professional
Noise is often the first warning of a developing fault. A service visit that includes lubrication, adjustment and tightening usually costs far less than a repair after the fault gets worse.
4. The door opens or closes unevenly
If one side of the door is higher than the other, or the curtain twists as it travels, the door is out of alignment.
Common causes
- Uneven spring tension
- Damaged or bent guides
- Worn or broken end plates
- Slats damaged by vehicle impact
- Shaft or barrel not level
When to call a professional
Uneven travel puts extra strain on the motor and slats and can cause the door to jam or fall. Do not keep operating it. This needs a technician.
5. Broken or worn springs
Springs balance the weight of the door so it can be lifted easily. When they wear out or break, the door becomes heavy or refuses to lift.
Signs of a spring problem
- The door feels very heavy when operated manually
- The door drops or closes faster than it should
- You hear a loud bang followed by a door that will not move properly
- The motor struggles or trips
What to do
Stop using the door immediately. Do not try to replace or adjust springs yourself. Spring failure is one of the most dangerous roller shutter door faults, and it requires a trained technician with the right tools.
6. Damaged slats or curtain
Common causes
- Vehicle or forklift impact
- Forced entry or attempted break-in
- Corrosion, particularly in humid or coastal environments
- Wear at the bottom rail from constant contact with the floor
What you can safely check
- Look for dents, bends, gaps, holes or rust. Photograph any damage for your records or insurance.
When to call a professional
Slat damage weakens the door and can stop it coiling correctly. A few damaged slats can often be replaced without replacing the entire curtain. Our article on the cost of repairing a roller shutter door explains what to expect.
7. Remote control or safety sensor problems
Common causes
- Flat remote batteries
- Remote out of range or needing re-pairing
- Dirty or misaligned photocell sensors
- Damaged safety edge or wiring
- Receiver or control board faults
What you can safely check
- Replace the remote batteries and test the wall button or key switch.
- Gently wipe photocell lenses clean and check that nothing is blocking the beam.
- Check that the sensors are aligned and their indicator lights are on.
When to call a professional
Never bypass or disable a safety device to keep the door working. Safety edges and sensors exist to prevent injury and damage. If they are faulty, they need to be repaired or replaced.
8. Motor failure or overheating
Common causes
- Age and wear
- A motor that is too small for the door
- Very frequent use beyond its duty rating
- Poor lubrication or a heavy door that puts extra strain on it
- Power surges or unstable power supply
Signs of a failing motor
- Humming without movement
- Slow or jerky operation
- Frequent tripping or overheating
- Burning smell
What to do
Isolate the power and call a technician. If the motor is undersized for how the door is used, replacing like for like will result in the same failure. A technician can advise on a heavy-duty motor rating that suits your operation. If your site suffers regular power cuts or surges, surge protection and a backup solution can help protect the motor and control board.
How to prevent roller shutter door problems
Most faults develop gradually. Regular maintenance is the cheapest way to avoid them.
- Schedule regular servicing. At least once a year for most doors, and more often for doors used many times per day.
- Lubricate moving parts as recommended by your technician.
- Keep guides clean and free of debris.
- Train staff to operate the door properly and to report unusual noises or behaviour straight away.
- Protect the door from impact. Bollards or clear floor markings around the opening reduce vehicle strikes.
- Never leave faults for later. A small problem today is a call-out tomorrow.
- Match the door to the job. A door built for occasional use will not last in a busy loading bay. If you are unsure, see our comparison of high-speed and standard roller shutter doors.
Repair or replace your roller shutter door?
Repair usually makes sense when the door is otherwise sound and the fault is limited to a component such as a spring, motor, slat section or sensor.
Replacement is worth considering when:
- The door is very old and parts are difficult to find
- Repairs are becoming frequent
- Corrosion or damage is widespread
- The door no longer suits how your business operates
- Security or safety standards have changed
Compare the total repair cost over the next few years with the price of a new door. Our guide on how much a roller shutter door costs in South Africa can help you budget for a replacement.
Frequently asked questions
Why is my roller shutter door stuck?
The most common causes are debris in the guides, a tripped safety sensor, damaged slats, a motor fault or a broken spring. Check for obstructions and power first, and call a technician if the door stays stuck.
Can I fix a roller shutter door myself?
You can safely check the power, replace remote batteries, clear debris and clean sensors. Springs, motors, shafts and barrels should only be repaired by trained technicians, because of the risk of serious injury.
How do I open a roller shutter door manually?
Many motorised doors have a manual release, chain or emergency handle. Use it only as the manufacturer or your technician has shown you, and never if you suspect a broken spring, because the door may fall.
How often should a roller shutter door be serviced?
Once a year is a sensible minimum for most commercial doors. Busy doors in warehouses and loading bays benefit from more frequent servicing.
How much does it cost to repair a roller shutter door?
It depends on the fault. A remote or sensor fix costs far less than a new motor or curtain. A technician can quote after inspecting the door.
Do you offer emergency roller shutter door repairs?
Yes. MSDN Group provides emergency repairs and after-hours call-outs, so a door that cannot be closed does not leave your premises unsecured overnight.
Need roller shutter door repairs in Johannesburg?
A roller shutter door that is not working costs your business time, security and money. Getting it looked at early usually means a smaller bill and less downtime.
MSDN Group supplies, installs, services and repairs roller shutter doors and other industrial doors for commercial and industrial clients across Johannesburg and surrounding areas, with emergency repairs to keep your operation running.
Contact MSDN Group today:
- Office: 011 070 9003
- Adolph: 079 596 1774
- Eric: 079 605 2527 (call-outs after working hours and on weekends)
- Email: info@msdngroup.co.za
Tell us the size of the door, what it is doing and when the problem started, and we will arrange a technician to inspect and quote.