The desired temperature in the wine storage unit been set too low.
Set the temperature correctly in accordance with the operating instructions.
The compressor is switching on more frequently and the temperature in the wine storage unit is falling.
Set the temperature correctly in accordance with the operating instructions.
Make sure that the door closes properly.
Only open the door when necessary and for as short a time as possible.
Make sure that the ventilation gaps are clear.
Remove dust regularly.
Decrease the ambient temperature.