Wife was over the moon with slide and hide cooker but when used with timer the oven light and main fan stayed on after cooking time finished. After reading manual again and trying several more times found the same results, reported fault and engineer came out fitted new controller tried oven for couple of minutes and said it was ok. After next use of oven found same problem so reported fault again engineer came out again and after several phone calls said that was the way oven was supposed to work. This is our third Neff oven over last few years and the first time oven has not switched light and main fan not coolin fan after timed cooking has been used which seems a waste of energy I cannot see point in main fan and light staying on when it has cooling fan for that purpose. We have timed the oven run on several times and the run on time is between 30 and 45 minutes.