Spring Start-Up Causes Multiple Zones to Run Simultaneously: Valves Left On or Debris

Spring Start‑Up: Several Zones On at Once; Some Won't Shut Off Without Main Valve

Likely causes:

Valves were left in the manual ON position at the solenoid/bleed screw during winterization.
Debris in valve bodies prevents sealing.

Read the spring start‑up manual: RiLawnSprinklers Operations Manual.

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