Novoferm
Drive sprocket or carriage disengaged
Novoferm garage door opener hums but the door does not move; chain or belt does not travel.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Broken drive sprocket on motor, Stripped carriage teeth, Chain/belt off the sprocket, Emergency release not re‑engaged
How to Fix / Troubleshooting
Safety first: Disconnect power before touching the chain/belt or carriage.
Steps to try:
- Check emergency release: Ensure the carriage is properly re‑engaged after using the red release cord. On many Novoferm units, you must move the door manually until the carriage clicks back into the trolley.
- Inspect chain/belt: Remove the cover and verify that the chain or belt is on the motor sprocket and rail pulley. Refit and tension according to the manual if it has come off.
- Check sprocket and carriage: Look for broken plastic teeth on the carriage or a cracked motor sprocket. Replace any damaged parts.
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Repair Difficulty
Medium
3/5
Required Part
Novoferm carriage / trolley
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