We have a 6year old Ariston Margerita 2000 and when we put it on any of the 3 different washes we use it gets to a point after its filled with water where it either stops completely with no lights flashing OR the dial clicks round and round and round and doesn't stop. When we pull out the plug and try and reset it it may or may not then finish the wash its doing. Is this a known fault and is it worth fixing?