When none of the zones run, the sprinkler system can seem completely dead. The lawn dries out, and it isn’t obvious where to start.
A system-wide failure usually comes down to something every zone shares: power to the controller, the controller’s settings, the water supply, a master valve or pump, or the common wire.
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Quick Answer
If no zones will turn on, start with the controller. Check whether it has power and a display, then whether it shows the system running. A blank controller points to power or transformer problems. A controller that shows zones running with no water points to the water supply, a master valve or pump, or the common wire. Most system-wide failures can be traced to one shared part.
What You May Be Seeing
- No zones run on schedule
- No zones run when started manually
- The controller screen is blank
- The controller shows a zone running but no water comes out
- A rain delay or sensor message is displayed
- The system stopped after a power outage or storm
- The system stopped after the water was shut off
Because all zones depend on the same controller, power, water supply and common wire, a failure in any of those stops the whole system at once.
The First Question to Ask
Does the controller have power and a working display?
If the screen is blank, the problem is power-related: the outlet, breaker, transformer or controller. If the controller has power, the next question is whether it shows a zone running.
If the Controller Has No Power
The controller isn’t getting power or can’t use it.
Common causes include:
- Tripped breaker or GFCI: the outlet has no power
- Bad outlet: the outlet itself has failed
- Failed transformer: the power adapter isn’t supplying low voltage
- Blown fuse: inside some controllers
- Damaged controller: often after a surge or lightning
If the Controller Has Power but Doesn’t Run
The controller is on but isn’t starting zones.
Common causes include:
- Programming issue: no start time or run times
- Rain delay: a delay or ‘off’ setting is active
- Seasonal adjustment: set very low or to zero
- Rain sensor shutoff: the sensor is interrupting watering
If the Controller Shows a Zone Running but No Water Comes Out
The signal is being sent, but water isn’t flowing.
Common causes include:
- Water supply shut off: the irrigation shutoff is closed
- Master valve failure: the main valve isn’t opening
- Pump problem: if the system uses a pump or pump relay
- Common-wire problem: the shared return wire is broken
- Controller output failure: the controller isn’t sending power
The Screen Is Blank
A blank screen usually means the controller isn’t getting power. Check whether the outlet works and whether a GFCI outlet has tripped. If the outlet has power and the screen is still blank, the transformer or controller may have failed.
After a Power Outage or Storm
Outages and surges can trip breakers, reset controller settings, or damage the controller or transformer. Check the schedule and settings first, then the power.
After the System Was Shut Off
If the system was turned off for winter or a repair, the irrigation water supply may still be closed or only partly open.
What You Can Check Yourself
- Check that the controller has power and a display
- Check whether a GFCI outlet has tripped (press its reset button)
- Look for a rain delay, ‘off’ setting or rain-sensor message
- Confirm start times and run times are programmed
- Make sure the irrigation water supply valve is open
- Try starting a zone manually from the controller
What a Technician May Test
- Outlet and input voltage
- Transformer output
- Controller terminal output
- Master valve and pump relay checks
- Common-wire continuity
- Water supply and shutoff inspection
Most Common Causes
- Power or outlet problem
- Failed transformer
- Controller failure
- Programming, rain delay or sensor setting
- Closed water supply
- Master valve or pump problem
- Broken common wire
Repair or Replace?
Many system-wide failures are fixed with a reset, a programming correction or a transformer replacement. Controller replacement makes sense when testing confirms the controller has failed. Master valve, pump and common-wire problems are usually repairable.
When to Call a Sprinkler Professional
Call a professional if:
- The outlet has power but the controller is blank
- Zones show running but no water flows
- You suspect a common-wire break
- The system uses a pump that won’t start
- Settings and power checks didn’t solve it
Find a sprinkler repair pro or read our emergency shutoff guide if water won’t stop.
Related Sprinkler Problems
- Why Is My Sprinkler Controller Screen Blank?
- Why Isn’t My Sprinkler Controller Working?
- Why Are Multiple Sprinkler Zones Not Working?
- How Do I Know If My Sprinkler Common Wire Is Bad?
- Why Won’t My Sprinkler Zone Turn On?
Related Repairs
- Sprinkler Controller Repair
- Sprinkler Controller Replacement
- Sprinkler Wire Repair
- Sprinkler System Inspection
Typical Repair Cost
What you pay depends on the cause, the parts and your area. See our Sprinkler Controller Replacement Cost Guide for typical ranges. Prices vary, and only an on-site diagnosis can give you an actual quote.
Frequently Asked Questions
Why won’t any of my sprinkler zones turn on?
Something all zones share has failed or been turned off: power to the controller, the controller’s settings, the water supply, a master valve or pump, or the common wire.
Can a rain sensor stop my sprinklers from running?
Yes. A rain sensor that’s wet, faulty or set incorrectly can stop all watering.
What does it mean if the controller is on but nothing waters?
If it shows zones running, check the water supply. If the water is on, a master valve, pump or common-wire problem is possible.
Do I need a new controller if my system won’t turn on?
Not necessarily. Power, settings and the transformer should be checked first.
Is it safe to check the controller myself?
Checking the screen, settings and an outlet reset button is fine. Avoid opening wiring compartments or testing live electrical parts.
Bottom Line
When the whole sprinkler system won’t turn on, start with what every zone shares: power, controller settings and the water supply.
If those check out, a technician can test the transformer, controller output, master valve, pump and common wire to find the failure.
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