Quick answer: If sprinklers continue running with the controller set to off, the problem is often at the irrigation valve rather than the watering schedule. A valve may be stuck open, manually opened, contaminated internally or unable to seal.
Controller off versus water off
Turning the controller off stops normal electrical commands. It does not physically shut off the irrigation water supply. A mechanically open valve can therefore continue passing water.
Check whether one zone or several are running
A single running zone points toward that valve and its circuit. Multiple unexpected zones may require broader valve, wiring or controller diagnosis.
Why prompt repair matters
Continuous irrigation can cause runoff, saturated soil and unnecessary water use.
See why sprinklers will not shut off and signs of a bad irrigation valve.
