I have 5 year old diplomat 8234. Worked fine until suddenly not filling with water, something - motor or pump? making increasing loud noise. When door is opened, it registers Error E2. I've trawled through the posts on the site but haven't found any clues. It is integrated and I have no idea how to find the float, clear blockage etc - would appreciate advice as to whether this sounds like a viable repair job for engineer or is it likely to be expensive and better to replace?