All Zones Running Simultaneously or Skipping: Solenoid and Valve Troubleshooting

System Activates All Zones at Once or Skips Zones

When electric valves all stay open, the solenoids are not closing. Causes:

• Solenoid plungers worn or stuck—inspect and replace if the plunger shows wear.
• Valves have debris preventing sealing—clean per irrigationtutorials.com.
• Controller sending constant voltage—test terminal voltage with zones off.

Ensure every solenoid is in the "OFF" position (manual override not engaged).