This is an integrated appliance can't see any serial number. There is no build up of frost/ice in freezer, freezer is working can hear electrical hum to whole appliance but cant hear a fan specifically.
Sorry, found it
Serial No: 32200054
Product No: 925 697 721 - 01
Hi, have checked freezer taken out all the drawers there is no ice build up could hear the fan running after I had the door open for a while.
Not sure if my reply when through.
Have taken out all the drawers in the freezer definitely not build up of ice. Could hear the fan running after the door was open for a while.
Have taken off the cover on the back wall behind the light, difficult to see into but looks like open vent - will switch off appliance and defrost in the morning. Hopefully this will sort out the problem will let you know.