How do I troubleshoot a sprinkler zone that won’t turn on?

Start with the basics

If one irrigation zone will not turn on, the issue is often with the controller, wiring, valve, or water supply. Begin by running the zone manually from the controller and confirming the station is programmed correctly.

What to check next

• Controller settings: Make sure the zone is enabled and assigned to the right run time.
• Water supply: Confirm the main shutoff and backflow assembly are open.
• Valve box: Look for debris, broken parts, or a valve that is not responding.
• Wiring: Inspect visible connections for loose or damaged wires.
• Sprinkler heads: Check for clogging or visible damage that may indicate a deeper problem.

If the zone still does not activate, the problem may be in the valve solenoid, a hidden wire break, or controller output failure. For reliable irrigation troubleshooting in Dallas, Dallas Landscape & Irrigation can inspect the system, identify the cause, and restore proper operation. If you want a professional evaluation, request an estimate.