Freezer shows E10 and the alarm sounds frequently; temperature may be too high despite continuous running.

Safety: Unplug the appliance before cleaning coils or accessing the compressor area. Do not attempt to open the sealed refrigeration system yourself.

Steps:

• 1. Check door and loading: Ensure the door closes fully and the gasket seals all around. Avoid overloading shelves so that drawers and door can close without obstruction.
• 2. Clean condenser: Pull the freezer away from the wall. If it has external condenser coils or a condenser grid, vacuum dust and debris thoroughly. On models with a condenser fan, ensure the fan spins freely and runs when the compressor is on.
• 3. Verify ambient conditions: Neff freezers are designed for specific climate classes. Extremely hot rooms or enclosed cabinets can cause poor cooling. Improve ventilation around the appliance.
• 4. Monitor temperature: Place a freezer thermometer inside and allow 12–24 hours after cleaning and adjustments. If the temperature remains above -18°C and E10 persists, a sealed system issue (refrigerant loss, restriction, or weak compressor) is likely.
• 5. Call a professional: Sealed system repairs require specialized tools and certification. Contact an authorized Neff service provider for leak detection and compressor/refrigerant work.