If your electric gate opens but will not close, closes part way, or starts to close then reverses, the fault is usually linked to safety devices, photocells, limits, inputs, obstruction detection, wiring faults, or mechanical resistance. This guide explains the most common causes, the checks that matter, and when to call a gate engineer.
Important: never bypass safety devices just to make a gate close. A gate that will not close may be detecting a safety fault.
The way the fault shows itself often points to the real cause.
| Symptom | Likely cause | What it usually means | Next step |
|---|---|---|---|
| Opens fine, will not close | Photocell fault, open safety input, timer/input issue | The board is being told it is unsafe to close or is waiting on an input condition. | Check photocells, safety edge circuits, loop inputs and any external controls. |
| Starts to close then reverses | Obstacle detection, force issue, drag, limit or encoder problem | The operator senses resistance or thinks it has hit something. | Check gate movement by hand, hinges/rollers, track and motor settings. |
| Closes part way then stops | Misaligned photocell, damaged cable, limit fault, dead spot in motor travel | A monitored input changes state mid-travel or the system loses position/reference. | Check all devices during the full closing run, not just at the start. |
| Only closes on hold-to-run | Safety devices failed, not learnt, or disabled incorrectly | The board may allow attended manual closing but not automatic safe closing. | Do not rely on this as a permanent fix. Fault-find the safety chain properly. |
If your gate opens but will not close, or keeps reversing on the close cycle, book a repair before the fault gets worse.
These are the faults we see most often on UK electric gates.
One of the most common causes.
If a monitored edge is open-circuit or faulty, the gate may not close.
The gate may be harder to move than the motor expects.
Not sure whether the fault is in the board, motor, photocells or the mechanics? We can diagnose it properly and quote for the repair.
Simple checks first. Safe checks only.
If you have checked the obvious issues and the gate still will not close, the next step is usually a proper fault-finding visit.
A proper repair visit should cover more than just resetting the board.
We can attend, diagnose the issue, explain what has failed and provide a repair quote for domestic or commercial electric gates.
Closing movement is where many safety risks show up.
Unsafe closing behaviour should not be ignored. If the gate is stopping, reversing or behaving unpredictably, get it checked properly.
We repair electric gates that will not close, reverse on closing, stop part way, or only work intermittently. We can inspect the safety devices, mechanics, motors, wiring and control board and explain exactly what is wrong.
If the gate is unsafe, isolate power if possible and keep the area clear until it has been checked properly.
Common questions about electric gates not closing.
The most common reasons are photocell faults, safety edge faults, open safety inputs, loop detector issues, or a control board that thinks closing is unsafe. Mechanical drag can also cause a gate to reverse or stop instead of closing.
This usually points to obstacle detection, excessive resistance, a faulty encoder or limit issue, or a safety device changing state during travel. A gate engineer should check both the mechanics and the control settings.
Yes. Dirty, wet, misaligned or failed photocells are one of the most common reasons an electric gate will not close properly.
No. Bypassing safety devices can make the gate dangerous and may breach safety requirements. It also hides the real fault rather than fixing it.
Yes. A dropped or dragging gate increases load on the motor and can trigger force detection, poor alignment, bad latch engagement, or repeated reversals on closing.
They can. Underground systems are more exposed to water ingress, limit issues and mechanical resistance if boxes fill with water or the gate geometry is poor.