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. 

You can also reply to other people’s questions if you like. (Thanks for helping)

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.

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

  1. I have an RD600-R (2011) that no longer works reliably. The sprinklers do not comes on with the timed setting tough they will in manual, there is no display when cold, the display returns when you press down on the back board, and it drains batteries. Not sure whether to send in the module, back board, or both. Please advise.


    • Hi Ken,
      Send in both the timer part with a dial, and the back terminal board. I am familiar with that problem and we’re not too busy right now so will have it back to you in no time. If you have any other questions let me know, or drop me an email using the contact us form at the top of this page.


  2. I have a Hardy Rain Dial. It works fine manually but it odes not work on the automatic program. New battery and I have had this Rain Dial and know how to program it.

    • Hi Daisy,

      It sounds like you know what you’re doing. the only think I can think of that might cause that problem is if the bottom slide switch is not detecting that it’s in the run position or that the semi-auto button is pressed but not not being properly detected.
      I would suggest doing a full reset by powering down the unit with no battery connected, this should clear out any problems and leave you with a default schedule of every station for 10 minutes, every day at 7am. You’ll have to reprogram it to your preferred schedule.

      If that doesn’t help, I’d suggest you send it in for repair. We’re not too busy right now because it’s still ‘off season’ for most people.

      Let me know if the reset works. you can also reach us via email at
      Brian – aka the RD-600 series Irritrol rain dial doctor

  3. My drip system is using 3 zones. When zone 3 comes on it shows “B4.9” on the screen and runs constantly until I turn off. It is watering flowers and set to anywhere from 10-25 minutes. Shutting down system and reprogramming does not fix problem.

    • Hi Michael,

      I believe this is a programming problem. The B refers to schedule B, and the 4.9 is saying that that valve has been set to 4.9hours.
      If you’re programming it to something else, it means that either the programming is done incorrectly or that the buttons, switch settings are not being correctly detected…

      You can try doing a factory default reset (see my DIY troubleshooting website). That should erase schedules B and C, and set schedule A to the default which is 10min on every station, every day at 7am.

      Try that and see if it clears out the B4.9 problem and then try reprogramming. If you can’t get it to accept your programming, send it in for repair.

      I hope that helps,

  4. HI Brian
    My Irritrol Rain Dial RD-600 display was not working, so I installed a new battery, and reprogrammed the current day and time. Now not matter what I try to do, the display flashes 0F3 and the time.

    • Hi Janet,
      That is part of the rain delay feature. I have some information about it and how to turn it off on my website here. Hope that helps,

      Meghan – RainDial Doctor in Training 🙂

  5. I have too many pop up sprinklers on 1 solenoid valve. How to split the station into 2. I have a 6 station irritol model and using 5 stations

    • Hi Clive,
      It looks like your message cut off a little early. If you have too many sprinklers connected to one Valve, you probably have to add another valve and re-pipe some of the pop-ups to a new valve.

      Does that answer your question?

  6. I have reset my controller to factory settings, reset my times and when I turn on my water and timer a different section comes on and runs when nothing should be running. I have checked my valves. Everything is clean. what should I do next?

    • Hi Pablo,

      Give me some more details and i can help;
      1) what station/valve number is coming on when it should not be on?
      2) When it’s on, what valve number is shown on the top of the timer’s display ?
      3) how many valves do you have?

      The valves (not the timer) have a manual on/off setting. They should always be in the ‘off’ position. Make sure they are ‘snug’

      Let me know more and I’ll help more.
      Brian – aka the Irritrol rd600 series rain dial ‘doc’

    • Hi Peter,
      Short means that the solenoid has shorted out and is bad, or the wiring is crossed somewhere. It is usually not a timer problem. I would recommend replacing the solenoid for the valve that the timer is trying to turn on and can’t. It is a do it yourself job for about $15 to $20.

      Meghan – RD600 RainDial Doctor in Training

  7. Does my Raindial Irritrol Model# RD600 run on a battery? If so, what kind? At present I am not strong enough to open the door on the right.

    • Hi Roberta,
      No, it does not run on a battery. There is a 9 volt battery in the back of the timer on the top that is used to keep the clock running if the power goes out. The battery is not required for it to operate. The panel on the right is not intended to be accessed because it contains high voltage. If you describe what the problem is more, I can offer further assistance.

      Meghan – RainDial Doctor in Training

    • Hi Robert,
      Thanks for the inquiry. That sounds like a problem we typically see. I would recommend sending both the controller and backboard in for repair. If you have a -R model, make sure to send in both parts. I will send you an email with repair information.

      Meghan – RD600 RainDial Doctor in Training

    • Hi John,
      I would recommend trying a factory reset. I have instructions on how to do a reset here. Let me know how it goes.

      Meghan – RainDial Doctor in Training

  8. I would like to send you a picture of my controller digital readout it is stuck on -94 and -AM and -HOUR and will not change, we have had power out for 5 days I hav changed the battery and still stays on that readout not sure what to do lawn is getting pretty dry, let me know what you think

  9. We’ve got an RD-900, station 6 is not working.Take it, RD900 only has 9 active stations although there are 12 stations to connect up to, that correct???

    • You’re correct. the backboards typically have screws and wiring for 12 stations, but the timers only implement circuitry to control what it advertises on the label. Thus, you won’t be able to move the wire for #6 to the wire for #10 or above and have it turn on.
      Try swapping wire #6 with #5 and see if 5 quits working. If so, it’s probably the solenoid. If 6 still doesn’t turn anything on then it’s a timer issue.

      I’d suggest sending the back terminal board in for repair with the timer and we’ll get it back good as new.
      Let me know if that answers your question and if you’re willing to send it in or drop it off (If you’re in the Phoenix area)


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