Re: Bosch KGU3201
Is it a repetitive fast clicking?
Does the noise stop when you open the freezer door?
If yes, perhaps it is coming from the fan at the back of the freezer compartment and there is ice build up near the fan blades.
The fan can be seen at the back of the compartment if you remove the top freezer drawer.
A picture of the fan can also be seen here with the rear inner wall removed:
http://www.ukwhitegoods.co.uk/forumsphpbb3/viewtopic.php?f=35&t=60815