Hardie HR6100 Stuck on Station 1: Reset or Replace?

HR6100 runs station 1 continuously (display shows “1A.05”) and won’t advance to stations 2-6. Program check reads okay. Unit is ~15 years old.

Reset Procedure

1. Remove 9 V battery.
2. Disconnect AC power for 1 minute.
3. Reconnect power without battery.
4. Reprogram from scratch.

Diagnose Valve vs. Controller

• If system shuts off when controller switch is turned “OFF” → controller issue.
• If you must manually close the valve to stop water → valve issue.

Given the unit’s age (discontinued ~15 years), replacement is wise. The Irritrol Rain Dial series is a direct, easy-to-program successor.