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Toro Vision 1 Zone Stays On – Valve Issue, Replace Solenoid/Diaphragm

One zone won't cycle off; must shut main water. Others fine.

Fix Order

Replace solenoid (easiest).
Replace diaphragm.
Replace valve (more work).

Guide: www.irrigationtutorials.com.

Irrigation: Rain Bird ESP-8LXi+ Zone 1 Valve Stays Open: Controller or Wiring Fault?; Toro Vision II Runs Extra Cycle: Check Start Times and Seasonal Adjust; Zone 3 Runs With All Others: Wiring Cross or Pump Start Wire Fault; Troubleshooting a “Possessed” Zone Valve That Runs With Every Station; Toro Vision II: One Zone Shows 24V Constantly But Won't Water; Toro 4‑Zone Hydraulic System: Two Stations Don’t Water – Valve Problem; RC-7BI Controller Single Zone Operation: Stuck Valve Diagnosis; Locating Buried Valve Boxes: Tips for Toro Vision Series; Rain Bird ESP-6 Zone 4 Stuck On: Valve Diagnosis; Toro Zone 3 Failure: Controller Voltage Test After Valve and Pump Replacement

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