I have a system with irritrol valves...sorry no model available. 3/4" size, flow thrugh valve. It will not come on using the controller. The solenoid is energized, the plunger in the solenoid lifts and stays up. I can manuually open the valve, but will not open using the controller. I've dissasembled and cleaned, twice, and still no luck. Any suggestions. Thanks for taking the time to have a look at my question.