Hi! I had similar problem with my Daewoo fridge freezer where the freezer was working and the light in the fridge but the fridge was not cold. I took all the shelves out of the freezer, removed the plastic backboard and saw that the fan behind (Which pumps cold air to the fridge) was all clogged up with Ice. So, out came the trusty hairdryer and I melted the ice! Put everything back again and the fridge started working immediately when I plugged it back in - give it a try!
Anthea
April 2009