Wine cooler shows E9 and may shut down or run at incorrect temperature; sometimes accompanied by beeping.

Safety: Unplug the unit before cleaning or accessing the rear components.

Steps to address E9:

• Check door usage: Ensure the door is closing fully and not being left open for extended periods. Verify that shelves or bottles are not preventing proper closure.
• Clean condenser: Pull the unit out carefully and clean the condenser coils at the back or underneath with a soft brush or vacuum. Dust buildup can cause overheating.
• Improve ventilation: Confirm that the installation meets Neff's ventilation requirements (adequate gaps at rear and sides, no blocked grills).
• Reset: After cleaning and improving airflow, unplug for 10 minutes, then restore power and monitor. If E9 returns quickly, an internal thermal sensor or overload device may be faulty.
• Professional service: Replacement of thermal protection devices or diagnosis of compressor overload should be carried out by a Neff service technician.