Wine cooler runs continuously but does not reach the set temperature; only slight cooling is achieved.

Warning: Do not attempt to add refrigerant yourself. This requires specialized tools and certification.

Continuous running with poor cooling on a De Dietrich wine cooler often indicates a sealed system efficiency problem.

• Verify door seal: Ensure the door gasket seals fully all around. Use a strip of paper to check for tightness; if it pulls out easily, adjust hinges or replace the gasket.
• Check ventilation: Confirm that the unit has proper clearance and that the condenser is clean and the fan (if fitted) is running.
• Monitor frost pattern: With the internal rear panel removed, observe the evaporator after 20–30 minutes of operation. A healthy system will show even frost across most of the coil. Frost only at the inlet or no frost suggests low charge or restriction.
• Professional diagnosis: If airflow and seals are good but cooling remains weak, a refrigeration technician should check pressures and locate any leaks. Sealed system repairs may involve replacing the filter-drier, clearing blockages, and recharging.