I had this, but the lack of water stalled the programmer. My machine's about the same age as yours Typ S6N28F. A repairman, £45 call out, told me it's not the programmer, he knew it was something else, good clue. My fault was either with the unit fixed to the remote end of the waste water pipe or the flat switch attached to the bottom plate. My guess is that the clear 7mm pipe had come off the former. Anyway, I fiddled with both units and Bingo! Good as new. Hope this helps.
Rik, October 2007