hi i had the same prob with mine,the noise was awful, called out repair man n he took out all the freezer drawers and unscrewed back pannel ( inside) and where the fan is there was a massiff ice build up, he switched off electricity to fridge and melted it with a hairdryer, done in 5 mins and prob solved, its very common 4 this to happen and over 5 years has happened about 10 times 4 me, hope this solves your problem .......
chelle
November 2009