I had similar problem with my Daewoo fridge freezer. The freezer and light in the fridge worked OK but the fridge wasn't cold even though I had it at coldest setting. I took all the shelves out of the freezer and unscrewed the plastic backboard. Behind was the fan (which pumps cold air up to the fridge) and it was blocked by ice. I got my hairdryer and melted the ice and the fridge worked fine when I plugged it back in! Give it a try!
Anthea, April 2009