Rain Jet RJC‑66 Flashing “6A” and “6C” – Programming Overlap

Display flashes 6A then 6C.

Rain Jet not a pro brand. Likely zone 6 has run time in both program A and C. This controller doesn’t display error codes.

Irrigation: Rain Jet RJC-66 No Operation: Systematic Checks or Replace Controller; Rain Jet RJC-66 Zone 2C No Water in Auto: Valve Diaphragm or Solenoid; Rain Jet RJC-66 Flashing "1C/2C" Error—Relay and Wiring Check; Rain Jet RJC-6A "M" Terminal Purpose—Master Valve or Pump Start; Rain Jet Sprinkler Head Replacement—Modern Brand Substitution; Rain Jet Timer Skips Zone 5: Wire Swap Test to Isolate Controller or Valve Fault; Rain Jet RJ711 Solenoids Cracking: Replace All with Rain Bird DV100; Rain Jet Valve Thumps and Spurts: Diaphragm Failure; Rain Jet Sprinkler System: Identify Controller vs. Manual Valves; Rain Jet RJC-4 Controller Error: Reset with Battery Removed

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