Hi.
Test and eventually replace the inlet valve.
The inlet valve is tested reading impedance, if it is broken, then it usually read infinity (circuit open). Reaing is done disconnecting valve and pointing multimeter probes at valve solenoid contacts (the cold ones in your case).
A definitive test on inlet valve is done reading volts while cycling and observing if valve is opening. For safety reasons is better if the user performs only tests that can be done with power off.
The switching contacts and inlets is also a test even if basic, I think that the valve is gone.
Here part:
Series 21 models: sub 22004333 (water inlet valve)
Series 12 models:VALVE-INLET
Valve is part nr.2 in diagram below. Click on the picture to enlarge.
If you repute this solution helpful, then please do not forget to accept.
Best regards.
Ginko.
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