If other zones run normally but one does not, start with the controller program and manual-run test. If that zone still fails, the cause may be a valve, solenoid, wiring connection, or a water-supply problem affecting that branch.
1. Confirm the controller is actually calling the zone
Check that the zone has a nonzero run time, correct program, and no rain or sensor override. Use the controller’s manual-run feature to test only that station.
If the controller displays a fault or short-circuit alert, note the exact message before changing settings.
2. Check the seasonal shutoff and water supply
If no zones work, look first for a closed irrigation supply valve or a seasonal winterization state. If only one zone is affected, the cause is more likely local to that station.
Never force a valve or backflow device. If water is leaking continuously, shut off the irrigation supply and seek professional help.
3. Watch for signs of a stuck or damaged valve
If the controller says the zone is running but none of its heads activate, a zone valve may be stuck closed, or its solenoid or connections may have failed.
Some valve boxes are below grade and difficult to find. Avoid digging near unknown utilities or attempting electrical repair without the required knowledge.
4. Inspect for obvious leaks
Look for soggy turf, bubbling soil, or a sudden pressure drop when testing the zone. A broken underground pipe may prevent heads from popping up.
If water pools rapidly, turn the irrigation water supply off. Repairing a buried line often requires excavation and should be properly located.
5. Check for clogged or damaged heads
If some heads spray weakly while others work, inspect for visible damage, debris at the nozzle, or blocked spray paths. Do not adjust heads on an actively leaking system.
6. Compare one zone with its neighbors
Record which zones run, which heads fail, and whether the problem is intermittent. The pattern helps a technician narrow down whether the failure is electrical or hydraulic.
7. Know when to call a pro
Call when you suspect a valve or wiring fault, underground pipe failure, persistent leaks, or a problem involving backflow protection. Share the zone number, controller model, and any fault codes.
Sources & verification
These links support the local rules, published prices, or technical guidance discussed above. Service fees and regulations may change.