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 ...

The biggest problem for people was the app, where more than half of the issues were reported. Others couldn't log in and some couldn't connect to the server.

Unlike previous generations, the Nest Learning Thermostat (4th Gen) that launched last month debuted without any manual control for display brightness. As such, the default dim settings of the display ...