Thanks Dave, I have also cleaned that part as well as the water matrix tank – the passages are clean and water flows well through it. When I turn on the machine, after the drainage is finished, water filling starts and I observed that the water matrix fills slowely (in comparison on what I saw on youtube as a normal filling up) which led me to the idea to check the inlet hose (with aquastop attached). So what I observed is that there is over 10liter/min of water into hose with aquastop but less than 2liters/min from the hose, so I started to wander if aquastop is the problem coz the hose itself has no gunde observed. Any thoughts?