Its actually a Zannussi DW24 bottom sprinkler not working

Here is the link for the user manual if you need it; http://www.serviceforce.co.uk/pdfs/U01296.pdf Check page 14 about cleaning the large filter and removing the lower spray arm to do so, you will probably find a blockage there that is stopping the water flow (the rotation is driven by water pressure). If there is nothing visible and cleaning in there makes no difference, first check that the water can freely run through the spray arm by simply holding it upside down and filling it with water, checking that it comes out of ALL the holes (think of them as jets) and that there is no significant limescale build up. If you are unsure or the holes seem blocked, put the spray arm in a bowl of vinegar for a half day or so and the limescale should be dissolved. There can also possibly be particles of food blocking it (rice is a favourite) which can only really be removed by a bit of persistence with a tap or hose - a garden hose in the garden is the easiest and least traumatic way. (some spray arms can be opened up - if it can be it should be fairly obvious but it is unclear from the manual and unlikely for this model). Make sure when you reassemble it that everything is exactly in the right place and tightened down properly if still no luck, then check that the water inlet hose is not kinked, the tap (if present) on the inlet hose at the wall is not half off, and the filter in the hose where it joins the machine is not blocked (to check this you have to turn off the water supply and remove the hose). Inadequate water pressure due to a restriction in the pipe will stop the spray arm spinning. The last thing to try is a complete descale - there could be limescale blocking the water in a part you can't get to - a bottle of vinegar on a hot cycle with nothing in the machine works, or you can buy "dishwasher cleaners" which are usually strong citric acid or similar that you just put in as if it was detergent and run (again empty). If you haven't done this recently it is almost certainly worth doing anyway. In Summary if there is water at mains pressure getting to the spray arm and the holes in it are clear and it is fitted properly, then it will spin. Hope this helps - please ask again if you need any help carrying out these procedures :)