Hardie Rain Dial 1993: Zones 6 & 7 Run Together—Crossed Wire or Controller

1993 Hardie Rain Dial: setting Zone 6 runs 6 AND 7. Setting Zone 7 runs both. No one touched valves.

Isolation Test

1. At controller: disconnect Zone 7 wire
2. Run Zone 6
3. If ONLY Zone 6 runs → controller fault
4. If BOTH still run → crossed field wires (Zone 6 & 7 touching)

Controller Fault Types

• Corroded circuit board
• Failed microprocessor/panel

Recommendation

16+ years old. Replace with Irritrol Rain Dial (same wiring, modern reliability).