When i turn on an individual zone from the control box, all the zones turn on. There are 6 total. All zones turn on as well when I turn on the manual lever on the anti-siphon auto sprinkler valve. Any thoughts as to why this is now occurring?
If it is a new system all the valves have their manual controls opened. Otherwise you have a lot of bad valves because a good valve, with the manual opener off, CANNOT operate with the power disconnected at the control box.