Ask your questions here – (They will appear shortly)

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Please look at the DIY Troubleshooting section before posting, answers to most questions can be found there. 

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Please try to include the following with your question, list:
1) the date code (located under the battery),
2) the model number shown on the face of the controller (usually below and to the left of the dial, e.g., RD-600 or RD-600-R).
3) Color (mostly Gray or Blue) based on the example rainDials shown at the top of the page.

668 thoughts on “Ask your questions here – (They will appear shortly)

    • Hi Gary,
      No, you would send it to Irritrol. We do repairs for the RD600, RD900, and RD1200 and -R models if you would like a repair.

      Brian – The RainDial Doctor

  1. Hello,

    We had to replace the battery on the control panel. After doing so and resetting everything the sprinklers do not turn on. Even when I use the manual button. We even unplugged the ribbon cable and reset everything again and the system appears fine as far as the display… goes but sprinklers do not turn on???

    Any suggestions?

  2. I have a 1990’S RD-900 controller with 8 stations hooked up. The number one station intermittently works. Some times it will under automatic, or it will turn on and then turn off after a minute. Sometimes it does not turn on at all. Sometime it works as it should. I have new valves with new solenoids. It does not turn on on the manual mode. If I turn the valve on at the valve it works fine. I have reset to factory settings as suggested and reprogrammed. I replaced the 9V battery. All of the other 7 stations work as the should during automatic, semiautomatic ad manual modes.

    Thank you

    • I apologize for writing so quickly. I went old school, low tech and cleaned the control box terminals. The system seems to be working correctly in all regards.

      Thank you for this great web site.

      • Oh, I just read and responded to your last message about the RainDial timer. My suggestion would be to keep a close eye on it; they tend to be intermittent as they fail. If the timer gives you any more trouble, keep me in mind. I’m glad things are working well for you now, hopefully they will continue.


    • Hi George,

      Answering this question will help me help you 🙂
      When the RD-900 turns off, does the display indicate that it turned off, or does the water just stop and the display indicates the RD900 should be on?
      Finally, do you see a flashing display at any time on the RainDial display?


      • The timer still indicates that it is running down but the valve has not opened. If I let the station 1 run its course, then the station 2 starts and the rest work fine. Right now things are working in automatically and manual so we shall see.

        Thank you for the responses.

  3. I have an RD-600. I had 6 valves running off of it. 2 of 3 in the backyard are running automatically with no issues.The 3rd is turned off. In the front yard, I have 3 valves. 2 (going to the lawn) which is now bark are turned off and cleared out in the RD-600. The 3rd in the front is supposed to be automatically running through the RD-600 for my front plants. It is not working.
    I can turn the manual bleed screw cw on the valve and it turns on, and off when I turn the screw CCW. But in the ccw off default position, the valve won’t work when I run the RD-600 manually for that valve and put in 10 min. on the clock. What could be wrong with the valve such that it won’t turn on.

    • Hi Yale,
      It sounds like there could be a wiring issue or a solenoid problem. I am writing you an email with some further questions so we can figure out what is going on.

      Thanks for the inquiry,

  4. My RD600-IRT is 20 years old. It does the default 7:00am for 10min. everyday. The only way to set the clock is to unplug it and start at 12:00. Nothing else works to reprogram this unit. Time for a new one?

    • Hi Wayne,
      Thanks for the inquiry. That sounds like a problem I typically see – go ahead and send it in. I will send you an email with detailed repair information.

      Meghan – Irritrol RainDial Doctor in Training

    • Hi Michael,
      That is an odd problem. I would recommend doing a reset and then reprogramming the timer. I have reset instructions on our website here.

      Hope that helps,
      Meghan – RainDial Doctor in Training

  5. I am getting a number on the controller screen when I turn to valve that is on. RO3,RO1,etc What do these represent? Btw,I could not get stations 3,4,5,to go on,I changed the solenoids,still no go.I flushed the valves,and checked the wire conections,still no go. RD600plus

    • Hi Stan,

      is it possible you’re seeing A03, A02 and A01 representing the minutes counting down as schedule A runs a valve? the captial A and R are similar on the display.
      If so, that’s expected as it is just showing a countdown of the schedule as it runs schedule a.

      Try doing tests with just the manual button: set switch to run, set dial on station 1, add some minutes by pressing + and press the manual-on button. This is a good way to test the valves. If you see a little number 1 on the top row of the display, it indicates the timer has tried to turn on the valve and is probably working as it should.
      Post back more info and I’ll offer more suggestions,

  6. I have a malfunctioning RD 600 Ext. I wanted to buy an upgrade to the RD 600 R. Looks like they are sold out. Should I buy a refurbished one?

    • Hi Robert,

      We just chatted via email and decided it’d be best to just send in your failing timer for repair. If it doesn’t seem like a good repair candidate, I’ll see what I can find for an upgrade.


  7. Rain Dial RD-900, serial no. 011398

    Transformer was unplugged for few hours. After plugging that back in Time clock shows frozen at 8:57. None of the control button is working. Prior to the unplugging everything had been working fine.

    Please suggest next steps.

    • I’d suggest unplugging and remove the battery as well for at least 5 minutes. If that doesn’t work, try following the reset sequence for the more blue -R timers. You’ll find a link on how to reset them on the DIY page.

      If that doesn’t work, post back here and let me know.

  8. All station work ok but one will not work but if I turn the value with a screw driver it comes on can you help me
    H Cox

    • Try switching the wire for the bad valve on the back terminal board with one that works. If the problem follows the suspect valve then it’s a wiring or solenoid or valve problem . When u say it doesn’t work, does the timer shut off or does it appear to be turning on the valve?

    • Hi Garland,

      That’s usually caused by one of three things:
      1) either a wiring issue,
      2) a ‘weak’ valve, meaning that the diaphragm inside one of the valves is starting to fail and a pressure change due to another valve turning on causes the ‘weak’ valve to turn on.
      3) a programming issue. If you see both valve numbers appear on the top of the display at the same time, then the timer is doing it and you have it incorrectly programmed (probably unintentionally). Look for overlapping schedules (ABC) that have the same startimes, or if you have one sequence of valves running that overlaps another sequence.

      Please post back and let me know what you find out.
      Brian – aka the RainDial RD600 series ‘doctor’

  9. My weather matic Rd 600 has been acting erratic. I have ordered new solenoids S20P to replace M24E. Will that renew my system

    • I’m not familiar with the weathermatic products, but solenoids usually do not cause intermittent problems. They usually fail completely.

      Sort I can’t help more.

  10. I have Rain Dial RD600-EXT, serial no. 501358. I’ve lost all power. Nothing comes on. I’ve checked the battery and fuse. What can I do further to solve the problem?

    • Hi Carol,

      You should first try to determine if your transformer is working. See the DIY page for a link on how to test it. Also, if you haven’t done so already, do a factory reset before doing anything else.

      If the transformer is good, send the timer and backboard in for repair. If you suspect it is bad, let me know and we can discuss options.

      Thanks for posting

  11. My controller defaults to program A and 10 minutes each station each day. This occurs randomly but every few weeks. Is my transformer failing or do I have a more serious problem? I have 3 other controllers on the same circuit and they are not showing any issues with the power supply. Any ideas or suggestions?
    Thank you

    • Hi Steve,
      That problem sounds familiar. I believe your transformer is just fine but you should send the timer in the back terminal board in for repair. I’ll drop you a separate email with details


  12. Rain Dial RD600, appeared to be dead no lights nothing. Changed the battery, the display is showing but will not go on in semi auto or manual mode

    • Hi Val,

      The first thing to check is if the transformer is working or not. There’s a section for testing it on my DIY page. Take a look there and let me know if you think the transformer is good, or if you’re not sure after doing the checks on that page.

      If the transformer is good, just send it in for repair and we’ll get it back to you quickly.

      Let me know what you find out either way,

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