I have a awz410 here, and when i select a programme, it constantly fills whilst continuing the program as you can hear the element beginning to heat the water. Its not a faulty valve and i have changed the timer and it still continues to do the same. Funny thing though is if i turn off the power at the mains while its its filling, and turn it back on it stops filling and continues the program as normal. Any ideas? Would it be the pressure switch or would the wiring be wrong on the pressure switch?