hi
i have had the same problem but i think i have solved it
go to http://www.eserviceinfo.com/download.php?fileid=36027
and get the service manual
you need to take the back plate off the fridge part 304A
and the drain pipe is there pull the pipe off its just a push fit and push a wire down it if its clear you will need to take two panals out of the frezzer
panle 332A has two screw and clips around the edge
its a bit tricky to get off due to ice at the bottom
then take pannle 330A off just held on with clips at the side then unplug the fan
you will see there will be loads of ice in the bottom
just melt it and jobs done
hope that a help
electo
August 2010