So mine continues to power off almost weekly. Still unplugging power source on unit and plugging back in works every time. Following the multimeter instructions in this troubleshooting article here, I decided to attach my multimeter and it in fact has sufficient power of 28.1 volts within the recommended range of 24-30 volts. So now I either deal with this or purchase a new unit with no assurance that I won’t face the same problem down the line. While I agree with @tmcgahey that there are likely many more units out there with out this specific issue I don’t agree that it’s not widespread. Miniscule or not I think we’re beyond coincidence here and not at all presumptuous. Like I’ve already said this controller should last longer than the 4-5 years it’s at now particularly since the dumb controller it replaced was working fine at the 20 year mark. Rachio’s are too expensive to be disposable at 4 years. When it works I love it, just wish I could rely on it. I’ll be contacting support again.
