Hi, Can anyone advise me please. Our Amica AK259 fridge freezer is working but the fridge won’t go down below 11 degrees even on the highest setting number 7. The freezer appears to be working well and is below -18 ( our thermometer only registers to -18!!). Is this a thermostat problem or something else. If it is the thermostat or another item that needs to be replaced can you give me the part numbers to be ordered. I would be very grateful if any advice could be given.. Brian