Rain Bird Timer Times Changing: Multiple Start Times vs. Sabotage

8-year-old Rain Bird system in California desert. Backyard lawn found underwater. Watering times changed to every 30 minutes from 7 AM to 2 AM next day. Gardener sets times, they get changed. Owner suspects sabotage vs. malfunction.

Controller Malfunction Unlikely

Power outage with dead backup battery resets controller to single daily start at 7:00 AM - not multiple start times every 30 minutes.

Multiple Start Times = Human Programming

The described schedule (every 30 minutes for 19 hours) requires 38 separate start times to be manually entered. Controllers don't spontaneously generate this.

Most Likely: Gardener Error

Common mistake: setting a start time for EACH zone instead of ONE start time for the program.

Correct: One start time (e.g., 7:00 AM) → controller runs zone 1, then 2, then 3 sequentially.

Wrong: Start time 7:00 for zone 1, 7:10 for zone 2, 7:20 for zone 3, etc. → creates overlapping cycles.

Verification

• Check controller for multiple start times in each program
• Ensure only ONE start time per active program
• Confirm gardener understands: ONE start time runs ALL zones in that program

Security Note

If truly not gardener error, consider a lockable controller cabinet. But 99% probability is programming misunderstanding.