yep its the pump take off the top then right hand panel (make sure it unplugged ) look at the back theres a grey box (the pump,- has the back wheel attached to it at the bottom ) unclip the the 2 clips holding it in inside the back panel , lift off the top clear the water put it back together if the light clears viola ,
then as above change the pump should take 20 mins and a screwdriver (took me longer took the whole thing apart lol)
m otto, July 2008