The cause of the problem is the inlet valve diaphragm has scale in the bleed hole.
If you take the valve apart, inside is a rubber disc with a hole in the centre and one halfway from the centre to the outer edge, the outer one probably has got blocked with scale.
Clear the hole and re-assemble and it should be OK
David
December 2008
Probably a faulty inlet solenoid valve. Cheap part. Replace it.
Spares suppliers:
www.4directelectricals.co.uk
http://www.ukwhitegoods.co.uk
www.ukapplianceparts.com
http://www.domesticspares.co.uk
http://shop.ezee-fix.co.uk
http://www.espares.co.uk
or simply go into google and type in "washing machine spare parts" - selecting "pages from uk".
Repair and service your own washing machine. Go to www.2ndwave.co.uk/manual.html
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix washing machines.