Press and hold the "SuperCool" button (blue snowflake) simultaneously with the "Down" (colder) arrow button for 5 seconds .
Ensure the appliance is in normal operation mode (not in Sabbath mode or a power failure alarm). liebherr service menu
Navigate to the standard temperature display (e.g., showing °C for the fridge section). Press and hold the "SuperCool" button (blue snowflake)
The display will flash CS (Customer Service) or Srv . liebherr service menu