The Nest Community is now Google Home & Nest!
We have moved to a new home. Please visit the Google Home & Nest Community to connect with other users, ask questions, and explore the new space.
If you get an e74 error code telling you there's no power, but you get a
volt reading across R and G wires of 24 or slightly higher, you may very
well have a bad thermostat, as I did.