The most common cause for a continuously running sprinkler is that there are too many start times programmed into the irrigation timer. There should only be 1 start time per active program. There are programs A, B and C available. The factory default is for Program A. You do not need a start time for A, B and C. Only for A. If you set a start time for all three programs then you are telling your irrigation system that it’s watering (3) properties.
To eliminate a program start time you will need to turn the dial to “Set Watering Start Times”. Push the + or – button until you reach “OFF”.
If this doesn’t solve your problem perhaps there are only issues going on with your sprinkler system. Please call our office to have one of our trained irrigation staff evaluate your system.