re: Nest nationwide outage. Honeywell just fine.

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what would cause it to stop working properly as apparently has happened?

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in january the units went offline because they were incorrectly interpreting 'low battery' from the cloud and going into hibernation mode.

weird and not sure what happened this time but it seems like a bit too much reliance on the cloud for stuff that should be running locally.

FROM NEST

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My Nest Thermostat won’t turn on, what can I do to fix it?

The Nest Thermostat has a rechargeable battery that gets its charge directly through your heating or cooling system wires. If the battery level gets too low, the Nest Thermostat will shut down until the battery is recharged. A blinking red light indicates that it is charging and will eventually turn on.

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WTF. my honeywell either gets power from the c-wire or it doesn't. the CR2025 battery is just there to remember my wifi password and maybe the time of day.

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the fix can require customers to follow a nine-step procedure to manually restart the thermostat, which involves detaching the device from the wall, charging it with a USB cable for 15 minutes, reattaching it to the wall, pressing a series of buttons, charging it again for at least an hour, and then. …

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NEST support