A sprinkler system that won’t turn on is one of the most common calls we get from Spokane homeowners, especially in early summer when lawns suddenly need water and the heat arrives fast. The good news: a lot of the time, the cause is something simple you can find in ten minutes without any tools. This guide walks through the seven most common reasons a sprinkler is not working, in the order we check them ourselves, so you can rule out the easy fixes before paying for a service call.
Quick Answer
If your sprinkler won’t turn on, start with the controller, the power supply, and the main water valve, then move to the zone valves and wiring. When the whole system is dead, the problem is usually power, the controller program, or a closed main valve. When just one zone is dead, it is almost always that zone’s valve, solenoid, or wire. Most of these checks are safe to do yourself, and the ones that are not are quick fixes for a technician.
Why won’t my sprinkler turn on? Start with these checks
Before you assume the worst, work through the basics. Roughly half the “broken” systems we look at in Spokane come down to a setting or a shutoff valve, not a failed part. Here are the seven causes, from most to least common.
- The controller is set wrong, off, or on the incorrect program
- No power to the controller, a tripped breaker, or a blown controller fuse
- The main irrigation shutoff valve is still closed from winter
- A faulty solenoid on the zone valve
- Damaged, cut, or corroded valve wiring
- Low or no water pressure reaching the system
- A stuck, clogged, or failed valve diaphragm
Is it the controller or the power supply?
The controller is the brain of your system, and it is the first thing to rule out. Open the cabinet and confirm the screen is lit. A blank screen points to a power problem: check that the transformer is plugged in, then check the breaker in your panel and any GFCI outlet in the garage, which can trip after a storm. Many Spokane homeowners find their system “fails” every spring simply because the controller reset its schedule after a winter power blip.
If the screen is on, confirm three things: the current date and time are correct, your watering days and start times are programmed, and the dial or mode is set to Auto or Run, not Off. Then run a manual start on a single zone. If a manual start works but the schedule does not, the program is the issue, not the hardware. Manufacturer guides like the Rain Bird controller support pages walk through programming step by step for most common models.
Did you open the main water valve this spring?
This one catches people every year. After winterization, the main irrigation shutoff stays closed all winter so no water sits in the pipes during a freeze. If your system was blown out last fall and you have not opened that valve, the controller can run a perfect cycle and nothing will come out of the heads. The main valve is usually in the basement, crawl space, or a garage near where the irrigation line leaves the house. Open it slowly to avoid a pressure surge that can damage heads. If you are not sure your system was ever reactivated, our Spokane irrigation services team can handle a full spring startup and pressure check.
Why is only one sprinkler zone not working?
When every other zone runs but one stays dry, the controller and water supply are fine, so the trouble is downstream in that single zone. The three suspects are the valve, its solenoid, and the wire feeding it. The solenoid is the small cylinder with two wires on top of the valve; when the controller sends power, it lifts a plunger that lets the valve open. A burned-out solenoid, a corroded wire nut, or a rodent-chewed wire all break that signal. In our experience, valve box problems are the single most common repair on older Spokane systems, where decades of moisture and freeze cycles wear out connections.
You can often test a suspect solenoid by gently twisting it a quarter turn to manually open the valve. If water flows when you open it by hand but not when the controller calls for it, the solenoid or its wiring is the problem. Replacing a solenoid is inexpensive and quick, but tracing a broken wire underground takes the right meter and some patience.
Could it be a water pressure problem?
If heads barely dribble or only a few pop up, you may have a pressure or supply issue rather than an electrical one. Low pressure can come from a partially closed valve, a leak in a buried line, or city supply that drops during peak summer demand, when many lawns water at once. Spokane runs tiered summer water rates, and the City of Spokane Water Department publishes water use and conservation guidance worth reviewing if you want to water efficiently. A sudden pressure drop in one area, paired with a soggy or sunken spot in the lawn, usually means a cracked line that needs to be dug up and repaired.
When should you call a pro?
Call a technician when the safe checks come up empty, when you find a buried valve or wiring problem, or when you suspect a leak in a main line. Probing for live electrical faults, digging blind for valve boxes, and diagnosing pressure loss all go faster and cheaper with the right tools. We also see homeowners spend a weekend chasing a problem that turns out to be a five-minute fix, so if you are stuck, a quick diagnostic visit often pays for itself. You can reach us through our contact page or by phone, and estimates on new work are always free.
Frequently Asked Questions
Why won’t my sprinkler turn on at all?
The most common reasons are a controller set to the wrong program, no power to the controller, a closed main water valve, or a bad solenoid. Check the controller and water supply first, then the valves.
Why is only one sprinkler zone not working?
When one zone fails but others run, the problem is almost always that zone’s valve, solenoid, or wire. A controller or main water issue would usually stop every zone at once.
Can I fix a sprinkler that won’t turn on myself?
Often yes. Checking the controller program, the breaker, the main shutoff, and the controller fuse are safe DIY steps. Buried valves, wiring, and pressure problems usually need a technician.
Why did my sprinklers stop working after a power outage?
Many controllers lose their schedule after an outage. Reopen the controller, confirm the date and time, set your watering days, and make sure it is in Auto mode.
Get Your Spokane Sprinklers Running Again
If you have worked through these checks and your system still won’t turn on, we can find the problem fast. Revive Irrigation has diagnosed and repaired sprinkler systems across Spokane, Spokane Valley, Liberty Lake, Mead, and the surrounding area for years, including the older and complicated systems other companies walk away from. Call us at (509) 986-4262 to schedule a repair or request a free estimate on new work.
Revive Irrigation Services — Spokane, WA. (509) 986-4262.
Frequently Asked Questions
Why won’t my sprinkler turn on at all?
The most common reasons are a controller set to the wrong program, no power to the controller, a closed main water valve, or a bad solenoid on the valve. Check the controller and water supply first, then move to the valves.
Why is only one sprinkler zone not working?
When a single zone fails but others run, the problem is almost always in that zone’s valve, its solenoid, or the wire running to it. A controller or main water issue would usually stop every zone.
Can I fix a sprinkler that won’t turn on myself?
Often yes. Checking the controller program, the breaker, the main shutoff valve, and the controller fuse are all safe DIY steps. Repairs to buried valves, wiring, or pressure problems usually need a technician.
How much does sprinkler repair cost in Spokane?
Most residential repairs run from about $90 to $300 depending on the part and labor, as of 2026. A simple solenoid swap is on the low end; digging up and replacing a valve costs more. Ask for a free estimate.
Why did my sprinklers stop working after a power outage?
Many controllers lose their program or reset to a default schedule after a Spokane power outage. Reopen the controller, confirm the date, time, and watering days, and make sure it is in Auto mode rather than Off.
Revive Irrigation Services — Spokane, WA. Call (509) 986-4262 or request a free estimate. Serving Spokane, Spokane Valley, Liberty Lake, Mead, Cheney, and the greater Spokane area.