Old Richdel: 6 sliders, 8 zone wires (10 total with power). No labels. New Rain Bird: 6 zone terminals + power.
Common reasons:
Old timer terminals should be numbered. Match wires by terminal number.
Imperial Valvet 11‑Station Timer Manual – Setting Instructions
Orbit Controller Replacement: Zone 2 Works on Old Rain Bird But Not New Orbit
Richdel 446PR Storm Damage: Replace with Rain Bird ESP or Irritrol Rain Dial
Rain Bird EC Controller Zone 8 Blanks Screen: Troubleshooting Steps
Richdel 508 PR Timer Replacement: Mid-Grade Hunter or Rain Bird
Rain Jet Timer "Bad 4" Error: Capped Zone Fix
Toro ECXTRA Timer: Manual Works, Auto Fails — Controller Defect
Nelson Timer E2 Code: Power Cycle with Battery Out, Need Model for Specifics
Replacing 20-Year-Old EZ-1 Timer (Rain Bird ESP Series Recommended)
Rain Bird ESP-1: Only Zone 6 Works — Check Common Wire
Repairing an Obsolete Richdel R412 Timer: Why Replacement Is Better
Richdel 476 Pri Station 4 Short Run: Voltage Test and Solenoid Check
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