Ok, I'm stumped. Let's see if the other Irrigation Pro's will chime in. You did try everything in my last post, right?
1. Timer in
off position?
2. Manual bleed screw closed on valve?
3. When new one was installed, it was put in the right way? (Arrow facing towards sprinkler laterals)
4. If you have voltage going to the solenoid, when the timer SHOULD be in the
off position, then its a timer problem. Unplug the timer and see if the zone shuts off. If it does, then your timer is shot.
Other then that, I'm out of "thinking power"