How can I fix a candy N1B frost free fridge freezer?

Sorry - not an answer as such. Just wanted to say my Candy has just developed the exact same fault, so perhaps something that's inherent in the design. Mine is 4 years old, and went like this very suddenly. Lights in fridge are out, and although freezer is working ok (I think) the fridge is freezing everything and ice (in a frost free) is forming on the back panel. Even turning it off/on again hasn't reset it. If anyone else has any ideas I'd appreciate them before I go buy a new one! Callout cost is £90!

Romayne Wright
September 2006