Novoferm garage door opener opens by itself without any apparent command.

Safety first: Until resolved, disconnect power when the property is unattended to prevent unauthorized access.

Steps to try:

• Inspect wall button: Remove and test the wall button for sticking or shorting. Replace if suspect.
• Check wiring: Look for moisture or damage in the low‑voltage control wiring that could cause intermittent shorts.
• Clear and reprogram remotes: On older Novoferm systems, clear all stored remotes and reprogram only your own, using rolling‑code remotes if available.
• Test with receiver disconnected: If an external receiver is used, disconnect it and see if the problem stops. Replace the receiver if it is the cause.