I have a funny situation, all of my zones used to work well but now in one zone when the timer shuts it down all the sprinkler heads shut down but one. This sprinkler head will not stop watering, I shutdown the power, unplugged the unit still wont stop. I then stopped at the main water line then it stopped, I restart the water at the main line and it is then fine. Next time the zone starts the story repeats.
Can anyone advice me on the problem here?
If it is a faulty solenoid/valve then all the sprinklers in that zone should get the water and all of them should be watering but accept this one head all of them turn off correctly!
If the problem is with the sprinkler then where is the water coming from?
This problem is driving me nuts....any help is appreciated.