how do i fix my servis condensor dryer?

I have a servis 7kg condensor dryer. This was bought from an auction without any instructions on use. It has always made a grinding sound but worked okay until recently (okay for about 5 months). Now it isn't getting very warm and taking ages to dry clothes. There is excess water around the enterance to the drum and when I pulled out the condensor? it also had some water in it. I am not sure if there is supposed to be a seal around the inside of the condensor part but there is a wavy bit of rubber in it that isn't attached to the sides all the way round.