Washing machine problem - no fill on one program

Hi Folks, Just punting this problem out to the good folks on uk.d-i-y to see if anyone has an idea about the cause. Servis washing machine about a couple of years old. When we put in some dirty washing and turn the rotary dial to code four and then switch on the machine it just rotates the contents in an alternating clockwise-then-anticlockwise direction but there's no intake of water! It kindof feels as if the water level pressure sensor has its inlet blocked, or its microswitch is saying "water up to level" when that is not the case. On a different program (code three) it does take in water - the only difference I can see between these codes is the wash temperature. Both water valves are open; rinsing is fine; hot intake is fine; I'm puzzled.
Any pointers to the cause gratefully accepted - thanks in advance.
Mungo
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One is probably a cold fill - the other a hot fill.
Check there's power to each solenoid valve when you'd expect there to be power - hot for 3, cold for 4.
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Skipweasel
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Guy King wrote:

Good idea Guy. The thing that puzzled me is that there is no delay before the drum starts its rotation - other machines we've owned will wait for a couple of minutes (to fill with water) before the "agitate" stage.
Time to get the machine out and the multimeter!
Thanks again for your kind help.
Mungo
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