This is the strangest thing, and I’m not sure how to begin to troubleshoot.
My system has 8 zones, 4 in the backyard and 4 in the front yard. Two valve boxes with 4 valves in each box, all wired to a Rachio 3. The system was installed about six months ago and has worked fine… until recently.
I noticed a few mornings ago that the front sprinklers weren’t running during their morning schedule, even though the Rachio app said they were. The back zones were all working fine. I went to work and came home that afternoon prepared to do some troubleshooting – and everything worked perfectly. I assumed it was just some random glitch, but the same thing happened the next day, and the day after that. Front zones won’t run in the morning, but around 11:00am everything fixes itself. The backyard zones work all the time.
There’s definitely water running through the lines. I can physically turn the top of the sprinkler valves and the sprinklers go on. The Rachio app thinks everything is working, and the controller is blinking blue as if the sprinklers are running. But at the valve box there’s obviously nothing happening. The valves don’t try to open. Until the afternoon, when everything works perfectly again.
My initial assumption was that there was a break in the wiring somewhere, but that doesn’t make sense. How can a broken wire fix itself every day, and break again the next morning??
I’m completely stumped. Any ideas why this is happening?