Add Yahoo as a preferred source to see more of our stories on Google. Hand holds a phone with the Nest app next to a Nest thermostat on a screen indicating HVAC running time - oasisamuel/Shutterstock ...

A smart thermostat can be incredibly useful for saving energy since it controls your heating and cooling, but what happens if the thermostat's battery dies?

Is your smart thermostat giving you problems? I've been there. This is what works to get them back on track. Tyler Lacoma Editor / Home Security and Smart Home Tyler has worked on, lived with and ...