Can you use a multimeter to measure the resistance of each valve? It should be between 25 to 50 ohm. If it’s too low, chances are that your solenoid may be shorted somewhere. There is a non-zero chance that the triac may be damaged due to solenoid shorting, but the triac is very easy to replace. I suggest that you send an email to [email protected] to arrange for further support. Thanks.