Rain Dial System Won't Start: Check Common Wire

Rain Dial system worked fine. Today, manual start shows "working" on controller but no water. Main water valve confirmed on.

Top Suspect: Loose Common Wire

Since no zones operate but the controller appears functional, the common wire (usually white) connecting all valves to the controller is likely loose or corroded at the controller terminal or a valve splice.

Checklist

1. Verify all electric valves' flow controls are at 50% (open fully, close fully, reopen halfway).
2. Re-check main water supply—try a hose bibb.
3. Inspect every wire connection at the controller and each valve. Use waterproof wire nuts.
4. Tighten the common wire at the controller terminal strip.

A single bad common connection kills the entire system.