Hardie 11-Year System: Zone 1 Failed Progressively, Now Dead

3-zone system. Zone 1 worked intermittently for a season (days on, days off), then stopped completely last year. Zones 2-3 work fine. User tired of dragging hoses.

Valve or Wiring

"Sounds like your problem is with the valve or the wiring for that station. Start by checking the wire connections to the valve, make sure that they are good and waterproof. If this doesn't help, you may want to consider replacing the solenoid on the valve, or since the system is 11 years old, replace the valve entirely. These things are mechanical, and do wear out over time."

Progressive failure (intermittent → dead) suggests diaphragm degradation or wire insulation breakdown. At 11 years, valve replacement is reasonable.