My Zanussi fridge freezer (not frost free) also has fridge not cold enough, compressor runs continuously. It has been defrosted but ice builds up in the fridge, which stays at 7 deg C whilst the freezer is minus 30C. Its not the thermostat, so it must be a defect in the refrigeration system. Its only 3 years old. I have tried the Zanussi website who haven't replied. I won't buy Zanussi again.
tom white, Winchester, July 2014