The Zanussi ZRT 6646S Refrigerator has some known problems that occur often. Here are some easy to do solutions for the problems or error codes your Zanussi might be giving you.
The appliance is not receiving power. This could be due to a power cut, a blown fuse, or the thermostat control knob being set to '0'.
The temperature inside the appliance is higher than desired, which could be due to the thermostat being set too low, the door being left open, or the appliance being located in an unsuitable position.
The temperature inside the appliance is lower than desired, possibly due to the thermostat being set too high.
There is an excessive build-up of frost and ice within the appliance, potentially due to a high thermostat setting or door closure issues.
The appliance is emitting more noise than usual, which might be due to improper installation or imbalance.
Water has accumulated under the salad drawer, possibly due to a blocked drain hole or incorrect thermostat settings.