Hardie RD-600 Display Goes Crazy: Module Cost vs. New Controller

RD-600 Display Haywire in Program Mode: Repair Economics

Unplugging + battery removal didn't fix erratic display. Replacement modules exist but cost as much or more than a new controller.

OEM parts markup: controller $150, module $120. Labor to swap + risk of other board failures.

Buy a new controller. Modern units (Hunter Pro-C, Rain Bird ESP-Modular, Orbit B-hyve) offer:

Same 24 VAC wiring. Label wires before disconnecting. Mount new controller, reconnect, reprogram.

Irrigation: Rain Bird ESP "SKIP" on Zones 8–10: Need Controller Model to Diagnose; Hardie RD-600 No Operation Despite 27VAC: Diagnostic Questions; Hardie 9‑Station Controller Replacement: Irritrol Rain Dial; Hardie Irrigation System Runs Continuously: Valve vs Controller Diagnosis; Hardie RJC-FOUR Controller: Obsolete Model Replacement Options; Hardie Controller Manual Station Error: Replace Panel or Upgrade to Rain Dial; Hardie 446PR Display Garbled: Reset or Replace; Hardie Controller Runs Continuously: Valve or Controller Fault?; Hardie HR6200 Fuse Holder Replacement: Contact Irritrol (Toro); Hardie Controller Displaying Random Characters: Reset Procedure

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