We had exactly the same problem with ours too. It's more than likely going to get worse. I got an engineer out who informed me that it was a compressor problem and common in this fridge freezer.
I ended up taking ****** (shop bought from) to small claims court over cost of the fridge freezer - went to trading standards first.
If I can help you then email me on maxxs_mummy@yahoo.co.uk
Donna
February 2007