Good morning. I have a Neff fully integrated dishwasher which I am pretty sure is a Series 2 (either S54M45X1GB or S44E45). For some reason it does not seem to finish its cycle. If you open the machine, sometimes it says there is only a minute left to run, yet it will run on and on and on with a wash cycle. How do I solve this problem (I have tried switching off the mains feed and restarting)?