Dear visitor, welcome to SPRINKLER TALK FORUM - You Got Questions, We've Got Answers. If this is your first visit here, please read the Help. It explains how this page works. You must be registered before you can use all the page's features. Please use the registration form, to register here or read more information about the registration process. If you are already registered, please login here.
Nothing changed recently that would cause such an issue with the wiring but I did take a look- no wires are touching.Did you do any lawn work that would have disturbed the wiring to the valves? If two wires are now touching they will both open.
Maybe wires in the valve box are touching
Do you have a master valve? Maybe one valve is stuck in the open position. If so take it apart and clean the insides.
Had to Google indexing valves... I suspect that you may be right. Odd that it only occurs when it's being run by the timer, though. I did find a helpful video on how to change out the stem & disk. The way my is installed is going to be very painful to replace- the water pipe leading into the valve is above the screws to open it. Mine also has a rotating stem at the top that allows me to go through the zones manually. I did pull that piece off & reseated it- doubt very much if that is going to resolve the issue though.the Intermatic controller is one made to control an indexing valve, and it is the indexing valve that is your problem, most likely.
This post has been edited 2 times, last edit by "Marvel" (Jan 20th 2013, 8:27am)