What is the zone actually doing?
Run a zone that works, then start the problem zone. Watch every head for a minute. What the heads do together tells you more than the first damaged part you notice.
No heads rise
The whole zone is missing either the command to open or the water that should follow it. Start with a manual run at the controller.
Every head is weak
This points to a shared flow problem, such as escaping water, a restricted valve, low supply, or the zone trying to use more water than is available.
Only one or two heads fail
Inspect those heads for blockage, visible damage, or water at the base. The rest of the zone working normally is an important clue.
The zone will not stop
Turn it off at the controller. If water keeps flowing, use an irrigation shutoff only when you can identify it with certainty, then schedule service.
Several heads showing the same problem?Have us diagnose the zone
Does the controller start the zone?
Use the controller’s manual start and select the problem zone. Check that it has a runtime and note any error, sensor message, or pause shown on the display.
If a manual run works normally, the issue may be in the schedule. If the controller says the zone is running but no heads rise, the signal or water stops somewhere farther along the path.
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Controller
Sends the station command.
Field wire -
Zone valve
Opens water to this zone.
Lateral pipe -
Sprinkler heads
Show whether water reached the zone.
Before service, take one photo
Capture the controller model, station number, and any message on the display. Note whether the problem began after digging, a power interruption, or controller work.
Do not open the controller, disconnect wires, or take apart the valve unless you understand that equipment and its shutoff procedure.
Controller says “running,” but the zone is still dead?Schedule a zone diagnosis
Why is the whole sprinkler zone weak?
When every head is weak, the cause usually affects the zone before water reaches the individual heads. Replacing the first nozzle you see may change the symptom without fixing it.
Look for escaping water
Watch for bubbling, soft ground, or an unusually wet strip between the valve area and the sprinkler heads.
Compare all the heads
Note whether every head rises partway or whether the spray gets weaker toward one end of the zone.
Leave the nozzles alone for now
A different nozzle can hide a supply problem or increase the amount of water the weak zone is trying to use.
The whole zone is weak, wet, or inconsistent?Have us test pressure and flow
When should you schedule sprinkler-zone repair?
Get the zone checked when the quick observations do not lead to a clear, visible correction. These symptoms do not automatically mean the sprinkler system needs replacement.
A manual start does nothing
No heads rise even though the controller shows the station running.
The controller shows an error
The station reports a fault, or the problem began after electrical or landscape work.
The entire zone is weak or wet
Several heads stay low, or water surfaces before reaching them.
The zone is intermittent or stuck on
It starts unpredictably, shuts down during a run, or continues after the cycle ends.
FAQ
Common questions
The display confirms a command, not that the valve opened. The cause may be a controller output, field wire, connection, solenoid, valve, or water-supply problem.
A leak, restriction, valve that is not opening fully, limited water supply, or a zone trying to use too much water can make every head weak. Pressure and flow must be checked to separate the causes.
Yes. A damaged station wire, common wire, splice, or solenoid can interrupt the signal between the controller and valve. Testing that path requires the controller instructions and electrical measurements.