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When to Replace an Old Richdel Irrigation Controller

Richdel 508Pri/512/Pri Works Only in Manual Mode

A 13‑year‑old Richdel controller that operates manually but ignores scheduled programs has reached the end of its service life. Repair parts are unavailable, and the cost of troubleshooting exceeds a new controller.

Recommended Replacements

  • Rain Bird ESP series – reliable, easy to program, widely supported.
  • Irritrol "Rain Dial" series – direct functional successor to older Hardie/Richdel models.

Both install in the same enclosure and use the existing field wiring. Expect $100–$150 for the controller plus ~$75 labor if professionally installed.

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