Hi - Miele KFN12924SD fridge freezer has just failed, after 3 years of careful use.

First the fridge part lost all cooling.

The freezer was OK for a few days after, but now can only get just below freezing point.
Looking inside freezer, there is a certain amount of frost build up - top right hand side rear (like a thin vertical strip of frost) and then from the next shelf down, full frost build up across entire width of rear, right down to bottom.

Service are on their way tomorrow, but when I pulled the unit out to look at the rear, I noticed 'rust' looking deposits near compressor. In fact, a number of pipes appear to have weird discharge stains.

Is this to be expected after just 3 years? or has there been some sort of fault in production?

If the latter, I'll ask for a full replacement (under warranty) as I don't want to lose lots of food all over again two years down the line.

Thanks.

just 3 years old fridge-freezer.jpg