Sprinkler master valve repair
When nothing comes on — no zone, no water — the fault is almost never the heads. It is usually the master valve. Local, licensed & insured — searching “sprinkler system won’t turn on near me”? You found us.
Sprinkler master valve repair starts by proving it is the master valve
A single zone that will not run is a valve or a wire on that zone. A whole system that will not run is something upstream of every zone — and the first suspect is usually the master valve. It sits between the backflow and your zone valves, opens whenever any zone is called, and when its diaphragm tears or its solenoid quits it stays shut and takes the whole system with it. Cary Sprinklers repairs and replaces master valves across Wake County, and we prove it is the master valve before we touch it.
That proof matters, because four other faults look identical from the driveway: a broken common wire, a controller with no 24-volt output, a supply valve someone closed and never reopened, and a backflow cracked over the winter. Each kills every zone at once and each costs a very different amount to fix, so we work the list cheapest first rather than starting at the valve box with a shovel. Systems that will not start in April are usually freeze damage; systems that quit mid-summer are far more often electrical.
We repair master valves and diagnose no-start systems across Cary, Raleigh, Apex, Morrisville, Holly Springs, Fuquay-Varina and Wake County — part of our irrigation repair service.
Why the whole system goes dead at once
Diagnosed right and fixed with genuine Hunter, Rain Bird & Toro parts.
The master valve is stuck closed
Its diaphragm tears or its solenoid quits and every zone downstream dies at the same moment. The controller still clicks, the zone valves still try, and no water moves. The most common cause of a total no-start.
The common wire is broken
One wire returns to the controller from every valve. Cut it — an aerator, an edger, a corroded splice in a wet box — and all zones fail together, which looks exactly like a controller failure and is not.
The controller has no output
A tripped GFCI, a failed transformer, a blown fuse, or a summer storm. Blank display is the obvious version. The one people miss is a controller that lights up normally but has lost its 24-volt output — it looks alive and cannot open a valve.
The water supply is off
The irrigation shutoff got closed for a repair and never reopened, or the backflow test cocks were left wrong after service. Too simple to be the answer, and the answer more often than you would think.
The backflow assembly is cracked
Freeze damage takes out the brass above ground, and a cracked assembly stops water at the front door of the system. Common in spring on anything not blown out properly the autumn before.
The controller is programmed, not broken
A clock reset after a power cut, seasonal adjust left at zero percent, or a rain sensor stuck tripped after a wet week. The system can run and has been told not to.
What you are seeing when the master valve is the problem
- No zone runs — not one, not on manual, not from the controller
- The controller display looks normal but starting a zone does nothing
- You hear a faint click at the controller and no water anywhere
- A zone opened by hand runs fine, but nothing runs from the clock
- It worked in October and would not start in April
How the work happens, step by step
No mystery, no runaround — here’s the order we work in.
Confirm it really is everything
We run each zone from the controller, then by hand at the valve. Running by hand but not from the clock means electrical; not running either way points upstream. That test halves the list before we touch a shovel.
Check output, not just the display
We meter the controller’s actual 24-volt output on a zone terminal. A normal screen with no output is common and easily misdiagnosed.
Meter the common and the field wiring
We check resistance on the common and each zone. A broken common reads open on every zone at once, which is how we separate it from a controller fault without digging.
Open the valve box last
Only when the electrical side is healthy do we open the box. We test the solenoid, inspect the diaphragm, and tell you whether it rebuilds or replaces before anything comes apart.
Recent work around the Triangle
What our Triangle neighbors say
Why homeowners choose us
Cheapest checks first, always
We work from the outlet to the valve box, not the other way around. Plenty of no-start calls end at a tripped GFCI, and you should not pay for a valve replacement to find that out.
Meters before shovels
A broken common wire and a failed master valve present identically. We tell them apart at the controller, before anything gets dug up — the difference between a service call and a landscaping bill.
Honest diagnosis and a guarantee
We test the actual parts before quoting and give upfront pricing with no surprises. Every repair is backed by a 100% satisfaction guarantee and a 12-month workmanship warranty.
Sprinkler master valve repair in Cary, Raleigh & the whole Triangle
A system that will not start is usually a same-visit fix once properly diagnosed. Choose your town for local details: Cary · Raleigh · Apex · Morrisville · Holly Springs · Fuquay-Varina.
Related services we handle on the same visit: sprinkler valve repair · sprinkler wiring repair · sprinkler timer repair.
Sprinkler master valve repair FAQ
What is a master valve and why does it stop everything?
It is a single valve upstream of all your zone valves, opening whenever any zone is called so the mainline is not pressurised all week. When it fails it stays shut — every zone dies at once even though every zone valve is fine.
Why won’t any of my sprinkler zones turn on?
When every zone fails together the fault is upstream of the zones: the master valve, the common wire, the controller, the supply or the backflow. The fastest way to narrow it is to open a valve by hand — if water flows, the problem is electrical.
Can I check anything myself before calling?
Three things solve a fair share of calls. Check the outlet feeding the controller has not tripped, the irrigation shutoff is fully open, and no rain sensor is still tripped after a wet stretch. Past that you need a meter.
Does a master valve get rebuilt or replaced?
It depends what failed. A torn diaphragm on a sound body is a rebuild with a genuine kit. A cracked body or a solenoid port that will no longer seal is a replacement. We tell you which before we start, not after.
Do you fix systems that won’t turn on near me?
If you are in Cary, Raleigh, Apex, Morrisville, Holly Springs, Fuquay-Varina or anywhere in Wake County, we cover your area. Most no-start systems are diagnosed and running again in a single visit.
Get your free quote
Tell us what’s going on and we’ll get right back to you — usually the same day. Prefer to talk? Call or text 919-341-9644.
- Local, licensed & insured
- Upfront pricing — no surprises
- 100% guarantee + 12-month workmanship warranty
Nothing coming on at all?
We diagnose it in order, cheapest first, and tell you what it is before we fix anything. Call or text 919-341-9644.