I'm sure that the idea of the Nest thermostat is noble, but they just work like shit. The one in our office cannot maintain a reliable temperature, and flakes out constantly. We had a fun week where someone went on vacation, and, apparently because their phone app was synced with it, the AC schedule started running in European time, rather than US Eastern...

At some point, you really just want to rip the thing out, slap the old fashioned, bimetal thermostat back in, and hit the Nest with a high-powered electromagnet.