One zone is on anytime the Controller is plugged in.
Please help! I'm far from a sprinkler guru, so any help would be appreciated. I've had the main water turned on to our sprinkler system all summer, but haven't run the sprinklers. I decided to run them this week so plugged in the main controller to the system. Zone 8 (of 12) came on even though it's timer is shut off. I took the solenoid out and tested it. The plunger sucks in when I plug in the controller like it's supposed to. Unfortunately, it stays on anytime the controller is plugged in. The other zones run like they should, but with less pressure since zone 8 is always on. I've seen posts talking about zones staying on because of some blockage in the diaphram, but if that were the case here, zone 8 would be on anytime the water is turned on to the system, but it's not. The only time it comes on is when the main system is plugged into power. BTW, it's a Toro system.
Any ideas?
Thanks.