Here's what happened...
I've had this thermostat in my house for 5 months, works perfect. Two days ago, I saw on the screen that the battery was dead. I pulled it off the mounting plate, replaced the batteries and for a few hours, it acted haywire. It would flash between all kinds of screens saying it couldn't connect to wifi, no power, starting in 2:00 and so on. I would hear the fan kick on for about 2 seconds and kick off.
Then I let it sit without batteries for a few hours, tried a factory reset and reinstalled the system on my app. I basically reset the whole system. I also killed the whole house breaker and turned it back on too. Now it can't detect the "C" wire. I tested voltage between wires and there's 28.2 volts between the "C" and a couple others.
It's not a compatibility issue because it's been working fine for months.
My big question is, has anyone heard of this specific issue or does anyone know if you can test a Nest with a multimeter?
