The fridge is 3 years old in july this year. It is not changing to 5degree as advised .After defrosting it returns to 12 - 14 degrees. It first took my notice when I noticed ice in the top the left hand corner, on removal it still did not return to normal.
There was excess frost -a large block- at back left hand corner no where else. The fridge was defrosted because we advised by the shop where we bought it.