"PR Off" = Program Off. Controller may have lost schedule.
Richdel 446PR 50Hz Won't Stop—Controller Failure
When to Replace an Old Richdel Irrigation Controller
All Zones Activate After Manual Valve Operation: Return Valves to 'Off' Position
Moss Lawns and Shade Groundcovers: Embracing Wet, Shady Conditions
Diagnosing Brown Patches in a New Lawn
Why Buried Soaker Hoses Fail for Lawns and Better Irrigation Alternatives
Garden Irrigation Systems: Automating Water Delivery for Healthier Plants and Less Work
Spring Start-Up Causes Multiple Zones to Run Simultaneously: Valves Left On or Debris
Irrigation System Dead After Yard Work: Cut Wire or Closed Valve
Irrigation System Loses Pressure After 5 Minutes – Water Supply vs Controller
Hardie 446PRI Zone Ran Overnight, Display Blank – Replace Controller
Hardie Controller Runs Manually at Valves But Not from Timer: Learn the Controller
Choosing Irrigation Brands for 1-Acre, 12-Zone System: Hunter vs. Rain Bird vs. Toro
Designing a Pressurized Irrigation Pump System with Safety Shutoff
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