Sprinkler systems are essential for maintaining a healthy lawn, but they can sometimes fail to turn off. First, check the controller for improper programming or overlapping start times, and unplug it to see if that resolves the issue. If the problem persists, it's likely a mechanical issue with the valves, such as trapped debris, a loose solenoid, a worn diaphragm, or a master valve stuck open. To prevent water waste, shut off the main water supply immediately. Then, contact an irrigation professional to accurately diagnose and repair the problem, ensuring your system in Tennessee functions efficiently.

If your sprinklers won't turn off, confirm it's not a controller issue.

Before diving into the mechanical components, it's essential to rule out issues with the sprinkler controller. The controller is the brain of your irrigation system, and improper programming can cause sprinklers to run continuously. One of the most straightforward issues to check is the programming on your controller. Ensure that you haven’t accidentally set overlapping or duplicate start times, as this can cause the system to cycle continuously without a break.

To determine if the controller is the culprit, turn it off or unplug it completely. If the sprinklers stop, then the problem likely lies within the controller's settings or internal malfunction. You might need to reprogram or replace the controller if it’s faulty. However, if the sprinklers continue to run even after disconnecting the controller, it’s time to investigate the valves, as the issue is likely mechanical.

Improper programming can cause sprinklers to run continuously.

The valves control water flow to your sprinklers, so a few things can prevent them from turning off.

Valves are crucial components that control the flow of water to your sprinklers. If the issue isn’t with the controller, it’s likely a physical problem with one or more valves. Here are some common valve-related issues that could prevent your sprinklers from turning off:

  • Trapped Debris: Debris can become trapped inside the valve, preventing it from closing properly. This is a common issue, especially if your water source carries sediment or if there has been recent construction nearby.
  • Loose or Faulty Solenoid: The solenoid is an electromagnetic component that opens and closes the valve. If it’s loose or faulty, it may fail to shut the valve completely, causing the water to continue flowing.
  • Worn Diaphragm: Inside each valve is a diaphragm that helps regulate water flow. Over time, this component can wear out or become damaged, leading to leaks and continuous water flow.
  • Master Valve Stuck Open: Some systems have a master valve that controls water flow to all zones. If this valve is stuck open, it could cause the entire system to run continuously.

What to Do if Your Sprinklers Won't Turn Off

Irrigation professional inspecting a sprinkler head on a lawn in Memphis, TN.

If your sprinklers won’t turn off and you’ve ruled out the controller, it’s crucial to act quickly to prevent water waste and potential damage. The first step is to shut off the main water supply or the backflow valve to your sprinkler system. This will immediately stop water flow and prevent further waste, giving you time to address the underlying issue.

Once you’ve stopped the water flow, it's time to call in the experts. A professional irrigation technician can diagnose the issue accurately. They have the tools and expertise to identify whether it's a debris problem, a faulty solenoid, or another issue. The technician will repair or replace any faulty components, such as cleaning out debris, tightening or replacing solenoids, or installing a new diaphragm. Regular maintenance can also prevent future issues, so consider setting up a schedule with your irrigation service provider.

Call Us Today to Schedule Our Irrigation Repair Service

At Herbi-Systems, we understand how important it is for your irrigation system to work correctly so that it can keep your plants hydrated. That's why we offer our irrigation repair service! Our team will promptly arrive at your property to inspect your system and determine what's causing your sprinklers not to turn off. Then, we'll perform the necessary repairs to get it back up and running in no time. Some of the common parts of an irrigation system that our experts typically handle include sprinkler heads, valves, controllers, pipes, and more.

We offer our irrigation repair service to commercial and residential properties, as well as HOAs, in Memphis, Collierville, Germantown, and nearby areas in Tennessee. Call us today at (901) 382-5296 to schedule this service!