FAAC
Erratic Motor Control or Encoder Noise
Door opens or closes jerkily, with sudden starts and stops, even though there is no obstruction.
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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
Loose encoder connection, Electrical noise on motor cables, Failing motor brushes (on DC models), Poorly secured opener causing vibration feedback
How to Fix / Troubleshooting
Safety: Disconnect power and secure the door before working on the opener.
- Check mounting: Ensure the FAAC opener is firmly attached to the ceiling or wall and that the rail is properly supported.
- Inspect encoder wiring: Reseat encoder connectors and check for damaged cables.
- Separate cables: Route low-voltage encoder and control cables away from mains and motor power cables to reduce interference.
- Test with door disconnected: If the motor still runs erratically with no load, the motor or control board may be failing and should be replaced.
Do not ignore jerky motion; it can stress the door and opener components.
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Repair Difficulty
Hard
4/5
Required Part
FAAC Motor Encoder
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