Transformers rarely fail,and when they do, it’s usually caused by people not turning the power off when they are moving wires and the 24VAC wires touch. Sometimes a failed solenoid could cause transformer problems but the timer usually shuts off and issues a FUS message before the transformer is damaged. Some models also have fuses on the back terminal board that help protect it.
A note of caution – the transformer is connected to your household 110/120VAC power, which is dangerous. Be sure to take precautions by turning off the power before working on the unit. You should not attempt it unless you are experienced enough to do so. This post does not contain sufficient information to work with these voltages safely; If in doubt, contact someone who is qualified.
Most of the time people think that the transformer is bad when it isn’t, Follow the DIY page topic on ‘How to test if the transformer is good’ to know for sure.
If you conclude that the transformer is bad, you can use the following information to help you understand how to replace it. I generally start on the left side and work my way around counter-clockwise.
After removing the case, you’ll see how the transformer is connected into the case. You can often find them on ebay or at a local landscape supply store.It should be rated for 1.25A, 24VAC.
The transformer typically looks like this.
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Brian, Jen, Meghan and Ben – the rainDialDoctors
Irritrol RainDial Interior/Exterior Case Configurations
The Rain Dial series of controllers come in two main configurations – interior and exterior. The exterior models have fairly solid housing and hinge mechanism. They also have the transformer contained on the rectangular section to the right.
The interior irritrol raindial models contain an separate transformer that plugs into an AC outlet. The hinge on the case is just a thin layer of plastic that can eventually wear down and break off.
What do do when the Case Door breaks off
Here are my thoughts on what to do with a broken hinge:
Unfortunately, there are note any good “official” solutions that I’m aware of. However, several customers have reported reasonable success with the following options:
- Use the extra thick black “Gorilla” duct tape; it’s very durable and has a good adhesive, better than typical duct tape. They sell this at lots of stores including Home Depot and Lowes.
- Use the packing tape that has the nylon strings built into it
- You might be able to add your own metal hinge to it, but that a bit more work; they sell small hinges in most hardware stores.
- Check with a local landscaper – sometimes they purchase the interior models because they’re cheaper and then take the controller module out of them to put in an exterior case (they’re actually the same, it’s the transformer that is rated external or internal). Thus, they often throw out the interior case…
If anyone has other solutions, please comment below.
(c) copyright 2017 Brian Keller – aka the RainDialDoctor
For help programming the RainDial RD600-1200 series sprinkler/irrigation controllers, see the following programming guide and then review the manuals above. This is a quick guide, not the user manual. If you’d like to see the full manual, click here.
- Irritrol Rain Dial Sprinkler Controller Programming Guide – template
- Irritrol Rain Dial Sprinkler Controller Programming Guide – Overview
- Irritrol Rain Dial Sprinkler Controller Programming Guide – Example and Programming Tips
Irritrol Programming Templates and Tips
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To add a question, go to the bottom of the page, fill in the comment and click Post Comment.
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.