From your description we understand that your machines vital parts like water pump, grinder, group and gears, boiler, electronic board all are working fine since there is a final result the coffee.
The only problem you face is that due to long time use some coffee liquid have dry out layer by layer and have goggle the Teflon pipe of the plastic unions so the coffee cannot be deliver through to the coffee tap and as a result is ending in the coffee drugs drawer.
So you need to disassemble you machine and remove the Teflon pipe which is after the coffee croup and by using a thing metal wire like a paper clip or similar you can check the pipe and the plastic unions to find out where they are goggled from dry coffee. You can immerse them in boiling water from some minute so the dry coffee to dissolve and be removed completely. By this chance you can remove also the coffee group filters and also clean them with hot water.
We have here below the link with exploded parts view of your model which will help you find the parts and understand how your machine is constructed.
http://www.partsguru.com/user/E003039-ed1.pdf
Also you may now you don't have any problem but we suggest performing at least once every month de-scale so to keep your machine in perfect condition.
Also if you might need nay part replacement you can even order it from the same side in this link
228 questions posted
Usually answered in minutes!
440 Questions
417 Questions
393 Questions
348 Questions
266 Questions