Hotpoint FFA74G Fridge Freezing Items

Hello there .. I bought a hotpoint FFA74G fridge freezer in April 06. Pretty much since I bought it, it had a problem with items in the fridge compartment freezing. Turned down to lowest and still doing it. Anyway, just had it diagnosed as a problem with the PCB, just wondering if this is a common problem in which case I’d go back to Comet or am I just unlucky. Apologies if I have posted to wrong place, but I’m a newbie (here at least!) Thanks