u/Delicious_Rabbit4996

I’m having intermittent problems with my Rachio 3 12 zone controller that goes offline and when I look at the controller, its display is dark with no lights. I unplug and replug the power supply and the controller recovers and sequences to all blue lights. The controller then works for an indeterminate amount of time (sometimes days, sometimes weeks).

What I’ve done to repair:

1. Replaced the power supply with a new one. Dark failures.
2. Contacted Rachio support. They saw the multiple offline events, and suggested I get a new controller. They thought it was faulty hardware.
3. Replaced the controller and power supply with a new 12 zone unit from Costco. Dark failures.
4. Suspected faulty AC outlet. Replaced outlet. Dark failures.
5. Suspected low voltage failure since Rachio AC transformer converts 120VAC to 24VAC. Added an Eaton Tripp Lite AVR550U 550VA UPS 300W Battery Backup Surge Protector AVR. Dark failure after 2 weeks.

I’m at a loss. I suspect Rachio firmware is causing the Dark failures. Any ideas?