DIY Troubleshooting

Scroll down to see the many DIY troubleshooting topics below

Please go through the following DIY list; if you don’t see what you are looking for, you can look through the Q&A and/or ask a new question about your sprinkler timer.

This do-it-yourself page will help you troubleshoot and diagnose problems with the Irritrol Rain Dial RD-600 and other irrigation systems.  We don’t want you to send in a sprinkler timer in for repair if it doesn’t need it. Click the links below to navigate the troubleshooting sections.  If you’re asking “How do I …”, keep reading.

For RainDial PROGRAMMING HELP and manuals, click here

Choose the Rain Dial problem troubleshooting topic below.

  1. Sprinkler/irrigation valves chatter or buzz or water pressure seems low.
  2. Display says FUS or FU5 and a number
  3. Display shows 5En or SEn
  4. Display shows OF1 or OF… some number
  5. Dispaly shows P:On or P:Off
  6. Display shows OFF or blinks when turning on a valve manually
  7. Display is blinking – see above
  8. Time is frozen or cannot change the time
  9. Valves do not come on when they’re supposed to
  10. Determine if the valves are good
  11. Valves are stuck on or come on when they’re not supposed to
  12. Valves will not shut off
  13. The case door won’t open or you lost your key 
  14. The case door breaks off or comes apart

Choose from Other Helpful Rain Dial and “How do I …” topics below

  1. How to check the fuse
  2. How to test the transformer to know if the transformer is bad
  3. How to test if the valves or solenoids are bad.
  4. How to reset the RainDial controller and set it to factory defaults
  5. Programming tutorial
  6. Programming worksheet
  7. Typical Sprinkler Valve Wiring Diagram

Here is a video showing common symptoms that indicate when a Rain Dial Controller needs to be repaired.

If this information wasn’t enough to resolve the issue, we can help:
Send it in for repair?

For other issues, or ones that are in progress and do not have a link yet, just contact us, or see details here: How do I send it in for repair?


60 thoughts on “DIY Troubleshooting

  1. Hi Brian,
    Our unit seems to work well on the timing feature except that we cannot get it to operate manually when needed- I’ve tried both the semi-auto option and also followed the manual’s directions for “manual operation”, neither work. I put in a new 9V battery, the unit is plugged in, the fuse looks fine, and I reset the circuit breaker for that outlet, plus I walked through the reset and reset the entire unit, none of which is changing anything. Any advice?
    Thank you, Katie

    • Hi Katie,

      To help, I need a little more info about what it does. E.g., when you try to manually turn on the valve, do you see the valve number appear in the upper row of the display, or does it just flash and go back to Off?

      Brian – aka the RD600 series RainDialDoctor

      • It does appear- it has “1” first, as I push the manual “on” button, it will rotate through all 6 – but nothing happens.

        • Try removing the battery – if the controller stays powered (you can still see info on the LCD), then you probably have an RD-xxx-R (the -R version). If so, then I’d send the controller and backboard in for repair, there’s not much else you can do on your end.

          If you remove the battery and nothing shows up, follow the diy steps to test if the transformer is good.

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