
Turnstile faults usually come from power, a reader or controller that isn't sending the open signal, the fire alarm input holding the lane in free mode, or a mechanical problem such as a worn solenoid or misaligned flaps. Check power and the reader before suspecting the mechanism.
Key takeaways
- Arms spinning freely: often fire alarm or emergency mode, or power loss.
- Locked and won't open: reader, controller or user not authorised.
- Flaps closing on people: sensor alignment or dirt.
- Clicking but not releasing: solenoid or mechanism wear.
01Symptom guide
| Symptom | Likely cause | Check |
|---|---|---|
| Arms spin freely all the time | Fire alarm input active, power loss, emergency mode | Fire panel status, power, mode setting |
| Won't open for a valid user | Reader or controller fault, user not enrolled | Reader beep and log, user permissions |
| Opens but locks halfway | Mechanism or solenoid wear | Technician check |
| Flap closes on people | Sensors dirty or misaligned | Clean and align sensors |
| Alarm sounds | Tailgating or reverse passage detected | Event log, sensor settings |
02Get it fixed
03Frequently asked questions
Why do my turnstile arms spin freely?
Usually the fire alarm input or a power failure has put the lane in free-passage mode, which is a safety feature.
Why doesn't the card open the turnstile?
The card may not be enrolled or permitted at that time, or the reader isn't communicating with the controller.

