I&#x27;ve also been told by people I know About Nests crashing and turning off. [edit: yes, anecdotal but it&#x27;s not an unknown event] This is completely unacceptable in a Northern climate. No, it&#x27;s not the only failure mode for a heating system but I have zero interest in adding another point of failure for the sake of having a cool device. Frozen pipes is a serious business.