Indesit Washer/ Dryer Model WIDL102 trying to fill but pumping out?

The problem is, switch on set programe and press door lock button, washer then tries to pump out, stops then starts filling. Before it can fill , the pump restarts again and punps out and keeps cycling .
Easy Iron green LED & Door lock red LED both flash on & off
Took out pressure switch and the only set of contacts that work ( tested using multimeter)when blowing in it are looking left to right 2nd & 4th connection make and break circuit.
After refitting to machine and testing on there, by blowing in switch can stop water filling , but still keeps pumping out and fault lights come on the same.
Any ideas ? faulty pressure switch or what next ?