Rain Bird ESP-6 "ERR" on Zone 3: Wiring or Solenoid

Error "ERR" Flashing on One Zone

If all other zones work, an "ERR" on zone 3 means the controller detects a fault on that circuit—usually a loose wire connection or a bad solenoid.

Troubleshooting Order

1. Check wire connections at the controller terminal #3 and common.
2. Check connections at the zone 3 valve solenoid.
3. If wires are tight, replace the solenoid (match valve brand/model/size).

Why Not the Controller?

Since other zones work, the controller's output circuitry is likely fine. The fault is isolated to zone 3's circuit.