WD860 Hotpoint washer/dryer .. not washing error somewhere?

I wonder if anybody could tell me the problem with my washer, about 20 seconds into a cycle F - 03 flashes up on the display and ends the cycle, this continues to flash and it sounds as if the machine is washing a load but then stops after about 5 mins.I cannot do anything without F-03 appearing on the display, is this a fault???