Hotpoint wd440 reduce creases light flashing ?

any assistance appreciated. on any cycle - after 20 secs the reduced creases light flashes and I have to switch off the machine. I have cleaned the filter cleaned pressure valve tube, blown down it and it's not blocked - blown into the valve and it clicks. a cycle will start, water starts filling then the pump come on, it does pump out into a bucket fine , lights flash and that's it
please help
Regards
Alun