Fix it
Sprinkler Zone Not Watering? Controller Fixes (2027)
Why one zone or all zones stop watering: master valve wiring, rain skips, solenoids, and Wi-Fi offline schedules diagnosed.
When a zone goes dry, the controller is the messenger more often than the culprit: skips, sensors, solenoids, and one shared common wire explain most silent zones. Diagnose in order, app state first, valve box last, and you will rarely need the shovel.
One zone never runs while others are fine
Swap the zone wire with a working zone terminal. If the problem follows the wire, the fault is field-side: test the solenoid resistance (typically 20 to 60 ohms), inspect the valve diaphragm, and check the splice at the valve box for corrosion. If the problem stays on the terminal, the controller output has failed and support or replacement is next.
No zones run and the app shows a schedule
Check the shared links: the common wire connection, master valve or pump start configuration, and any rain sensor stuck open after a storm. Confirm the controller is not in a rain delay, seasonal shutdown, or off mode set during winterization and forgotten. A manual all-zone test from the unit isolates app confusion from field faults instantly.
Controller waters during rain despite smart skips
Verify the weather source location in the app; a controller geolocated to the wrong town skips the wrong storms. Enable every skip type you expect, rain, saturation, freeze, and confirm forecast thresholds are not set so high they never trigger. As a belt-and-suspenders layer, wire a physical rain sensor, which no forecast error can override.
Controller shows offline and watering seems erratic
Most controllers here run the last schedule offline, so erratic usually means the schedule itself, not the outage. Restore Wi-Fi by improving garage signal, a mesh node beats a new controller, then audit the app schedule for duplicate programs fighting each other after a household member experiment.
Questions, answered
How do I manually run a zone to test?
Every pick supports manual runs from the unit or app quick-run. Use a 2-minute test per zone while walking the yard with your phone.
Why does one zone look weak compared with others?
Usually hydraulics, not electronics: a partially clogged head, a kinked lateral, or too many heads for the zone pressure. The controller delivers time; pressure problems live in the field.
Should I reset the controller to factory?
Last resort, after photographing wiring and exporting schedules where the app allows. A reset erases the zone tuning that took a season to dial in.