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If the version is earlier than 1.1, you’ll need to update. If you have a Nest Thermostat, select Settings Version.If you have a Nest Thermostat E or Nest Learning Thermostat (3rd gen), you don’t need to update.Finish installing your Nest thermostat before you install the power connector.Note: If your system doesn’t have a C terminal, you’ll need to call a pro. You can install the power connector yourself, or call a pro. For a brief video of the installation process, go to How to install the Nest Power Connector. Note: If the app tells you that you do need the Nest Power Connector during installation, you may need to exit set up until you have received the connector. Your thermostat repeatedly disconnects from Wi-Fi.įor a more extensive list of symptoms, go to How to tell if your Nest thermostat needs a C wire.

Your thermostat battery keeps draining.

Replace now and install stable power source.”

Your thermostat screen shows “Very low battery.

Your thermostat screen shows a power-related help code, such as E1, E297, N260 or N261.

During thermostat setup, the Google Home app tells you that you need the Power Connector or a C wire.

Use the interactive tool to check if you need a Nest Power Connector with the compatibility checker.Ĭases that may require power connector installation or a C wire: How to tell which Nest thermostat you have How to tell if you need the Nest Power Connector The Nest Power Connector works with these Nest thermostats: We recommend using a Nest Power Connector to ensure compatibility and best performance with your thermostat.

Warning: Some 3rd party C wire adapters can cause problems or damage your Nest thermostat, even if they claim to be Nest compatible. If you don’t feel comfortable installing the Power Connector yourself, you can contact a pro to install it for you.

But if there isn’t a C wire, you have two options: get a pro installer to run a new C wire from your system to your thermostat, which can be expensive, or you can install the Nest Power Connector, which is usually simpler and more affordable. If your system already has a C wire or a spare wire, you can simply connect it to your thermostat and HVAC system. Either one will provide a stable power source for your Nest thermostat when your system can’t deliver enough consistent power to it. If your thermostat has power related issues, like the battery draining too quickly or Wi-Fi constantly disconnecting, you can typically fix them by connecting a common wire (C wire) or by installing the Nest Power Connector.