indesit idl 530 will not fill?

My indesit 530 will not fill with water. Yes tap is switched on. Throw in a bowl of water and it pumps out OK. Suspect none return valve or water level float. The none return vave will be easy to locate but where do I find the level float. Of course it may not be either of these items so any suggestions welcome. Thanks Bill

bill
September 2010