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I consider it prudent. Back in 2016, a software updated borked all the Nest thermostats causing them to lose power, and thus allow homes to freeze. https://www

• olyjohn 6y ago
  My Nest has worked fine for the last 8-9 or so years, I have the original version that came out before Google bought them. It's been solid. That said, I did still keep the old thermostat around in case something happens.
  • sjg007 6y ago
    Yep. Having a backup or being able to find one is important. You can also just jump the two wires together. I've actually found that I keep the temp at a specific one for the season so I've never actually needed any of the remote features except I like the fan scheduling thing. I thought I would do the whole preheat or cool the house thing and what not but it's actually not a relevant feature for my local climate and house. So I found that it's way better just to leave the thermostat on and maintain the conditioned or heated air.