I have a Beko CF5533 frost free fridge freezer about 5.5 years old. The other day I noticed the noise from the fan in the freezer was slightly different but it was not blocked and later the food in my freezer was soft. It was running at about -5c The fridge at 4c about normal. It seemed to be turning on and off normally with the thermostat. \nI tried turning off the electric for an hour then back on but still the same. Yesterday turned off the power for 24 hours and left the doors open. There was a lot of water on the plastic tray on top of the compressor which I emptied. it now works ok and the freezer gets down to about -18c It was last switched off for 1 month about 2.5 months ago so it would have defrosted then. Is there a part I should be looking to replace in this model ?