Advice required on what to do with a KENWOOD KDW12ST3A which doesn't drain ?

My Kenwood KDW12ST3A does not drain. There is no fault code , it simply gets to the end of the cycle leaving water in the base on the dishwasher. I have checked for blockages in hose and all seems ok. I was thinking it must be something to do with a drainage pump ?? Has anyone out there had any similar problems and managed to resolve.