Hi HW,

I am a little puzzled by your description. To clarify I need you to answer some basic questions.

1. Is your system new?
2. Was it installed by Hydro-tech the irrigation company that installs name brand system components?
3. What brand and model is your controller?
4. How many zones (auto-valves) in your system.
5. What duration is the zone set for? The controller should read how much time is left watering the zone. Does this go to zero and the valve doesn't stop irrigating? What does the controller show when this happens?

It seems to me, and you can set me straight on this,that if there is a problem, it may be in the controller. Spanking the valve is never a good thing and probably caused the solenoid to shut the zone down prematurely. The valve is not the brains of the system, the controller is. JMHO Aloha