I had the same problem and actually thought my fridge freezer was broken so therefore called out the engineer. He has told me that such appliances need to be stored at room temp - 16-32degrees and if not it will not work propery!!! Apparently he claimed most people know this - clearly not! I now have a rather attractive fridge freezer in my antique dining room until i can arrange an alternative!!
Apparently if you want a freezer in the garage it is best to have a chest freezer as they work in a different way and cope better!!
Anna Siveter, December 2007