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So how many people did Honeywell reset yesterday? I woke up and the house was 61F inside (19F outside). I checked the thermostat and it was saying it needed to be configured. By the time I got it working, the house had dropped to 56F. Imagine if I was not home ... would I be returning to broken water pipes?
Long story short, Honeywell pushed an update to the thermostat and some stats went back to factory default settings.
Lack of failsafe means it has to go! Just ordered an ecobee3 ...