The issue is at the valve, not the controller.
Troubleshooting a “Possessed” Zone Valve That Runs With Every Station
Troubleshooting a Richdel Front Drip Zone That Clicks But Won't Activate
RC-7BI Controller Single Zone Operation: Stuck Valve Diagnosis
Hunter XC Controller Failure: Solenoid Click but No Water—Test with 9V Batteries
Valve Won't Shut Off Completely – Install Inline Check Valve
Zone 6 Works Manually But Not from Controller: Electrical Fault
Hydrotek 2120 Stuck on One Zone? Rebuild the Indexing Valve
Find a Broken Zone Wire: Rent a Wire Locator
Zone 5 Won't Fully Close: Pressure Loss to Zone 6
Single Sprinkler Station Fails: Diaphragm Replacement Fix
Troubleshooting a Stuck Irrigation Zone: Why Zone 19 Won't Shut Off
Diagnosing an 18-Year-Old Hardie Controller with SC Error Codes
Troubleshooting a Single Zone Failure in a Five-Zone Sprinkler System
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