my fridgefreezer is just over 3yrs and i got the same problem. I was told to defrost it over night, which does help. I have defrosted it 4 times in the past 6mths. Had a fridge repair man in work today, asked him about it, he said it need a new valve or the self defrost heater has gone, can be fixed. Thinking of getting a new one don't trust it, never buy servis again had a candy for 15yrs no prob.
Caz, September 2008