Updated: 07.11.2026
In brief: If a roller shutter motor does not run, the motor itself is often not to blame: frequently the thermal protection has tripped, the switch is faulty, an end position has shifted or the curtain is frozen. Only if there is power at the motor and it still does not turn is a replacement due.
Causes at a glance
| Symptom | Probable cause | What to do? |
|---|---|---|
| stops after a few minutes of continuous operation | Thermal protection | let it cool down for 15–20 minutes |
| runs in one direction only | End position shifted or switch contact faulty | readjust end position, have switch checked |
| hums but does not turn | Curtain blocked or frozen, brake or capacitor | Free the blockage; in frost, wait |
| does not respond at all | Fuse, switch, cable | check fuse, qualified electrician |
| Radio motor does not respond | Batterie im Handsender, Sender abgelernt | replace battery, pair again |
| runs jerkily or noisily | Bearing, adapter or shaft damaged | Check the mechanics |
How to proceed
- Check fuse and switch – with radio, first the transmitter battery.
- Wait a moment: if the thermal protection has tripped, the motor runs again after cooling down.
- Check the roller shutter for blockages; in winter look out for ice in the guide rails.
- A qualified electrician checks whether there is voltage at the motor.
- If there is voltage and the motor does not turn: replace the motor.
Modern motors such as the A-OK AM45 radio tubular motor have frost protection: they stop when the curtain is frozen instead of overloading.
Replace the motor instead of repairing it
Tubular motors are sealed and are practically never repaired. A new motor costs from €65 net at A-OK (AM45 mechanical). The steps are shown in Replacing a roller shutter motor.
Frequently asked questions
How long does a roller shutter motor last?
With normal use, usually many years. Frequent continuous operation and overload from freezing shorten its life.
Can I still open the roller shutter?
Nur mit Motoren mit Nothandkurbel, etwa dem A-OK AM45E. Otherwise the roller shutter stays in its position until repaired.
Calculate the torque yourself: Roller shutter motor calculator. All guides on roller shutter, awning and external venetian blind motors: Sun protection guide.
Advice on the right motor
Send us the shaft diameter, curtain size and material – we will name the right A-OK motor. Phone 040 50694631 (Mon–Fri 8 am–5 pm) or via the Contact form. All motors at a glance: Sun protection motors.
Technically reviewed by Dietmar Heiken, Sales, Vent Systems HDI GmbH, Hamburg – around 20 years of industry experience. Questions? Phone +49 40 50694631 or info@ventsystems.de
Last updated: 07.11.2026
Questions? 040 50694631 · info@ventsystems.de
