Hi
Liebherr cun3033 working fine except it beeps constantly and temp and fast freeze button flash constantly.
Temperature is okay so not sure if it is the fridge sensor?
jon
More than likely the fridge evaporator sensor, but you can qualify this by either measuring the resistance of the sensor from the plug at the pcb, or just unplugging it and seeing if the error code changes.
The fridge evaporator sensor is identified by green on the plug.