Nest Support

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I see a “Failed to connect” message when attempting to join my Wi-Fi network

When you join your Wi-Fi network, the Nest Learning Thermostat attempts to connect wirelessly to your Wi-Fi router. This article will help you learn more about how to troubleshoot most Wi-Fi connection issues that may occur with the Nest Thermostat.

If the Nest Thermostat encounters a problem when attempting to join your network, you’ll see a “Failed to connect” message on the screen.

This guide will help to identify what the problem is and provide the troubleshooting steps to get it resolved.

1) Enter your password again.

The first thing to try is entering your password again.

Be careful to enter uppercase and lowercase letters, numbers and symbols as needed. The Nest Thermostat can switch between four different keyboards to enter these characters.

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2) Try connecting using another Wi-Fi device.

Once you’ve tried re-entering your password, you should try connecting to your Wi-Fi network with another device (mobile phone or portable computer) next to your Nest Thermostat.  

If the other devices can’t connect either, you may be too far away from your access point or there may be a problem with it.

Contact your access point manufacturer or ISP (Internet Service Provider) for further troubleshooting.

3) Restart your Nest Thermostat.

The next step is to restart your Nest Thermostat. If you’re going through setup for the first time, you’ll need to skip the Internet Connection step and complete the setup interview before you can restart.

To restart your Nest Thermostat, go to SETTINGS > RESET and select RESTART from the available options.

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Once your Nest Thermostat has restarted, go to SETTINGS > NETWORK to try to connect again.

4) Reduce the number of wireless devices connected to your network.

Some Wi-Fi routers have a limit on the number of wireless devices that can connect to the Internet.

To test if this is your issue, shut down one of the Wi-Fi enabled devices in your home. Once that device is completely shut down, try again to connect to the network with the Nest Thermostat.

If the Nest Thermostat successfully connects, consult the documentation for your access point or contact your ISP to find out if you can increase the number of simultaneous connections to your Wi-Fi network.

5) Restart your Wi-Fi router.

If that doesn’t work, try restarting your router.

While most routers just need to be unplugged and plugged back in to restart them, you should refer to your router’s documentation for specific instructions.

Once your router finishes restarting, verify that it's working by connecting to that Wi-Fi network with a computer or mobile device and visiting

6) Temporarily turn off wireless encryption or security on your router.

The next step to try is to turn off the password requirements on your Wi-Fi router. This will rule out any encryption issues.  

If the Nest Thermostat connects without encryption, adjust your security settings to keep the Nest Thermostat connected. The Nest Thermostat works with standard Wi-Fi security types, including WEP,  WPA and WPA2.

If you’re using a different security setting, you’ll need to switch to a supported security type. See router manufacturer documentation and resources for instructions.

7) Turn off MAC address filtering on your Wi-Fi access point/router (if it’s currently on).

If you have MAC address filtering enabled on your Wi-Fi router, you should try temporarily disabling this feature.

Successfully connecting without it enabled means that you’ve entered the Nest Thermostat MAC address incorrectly (or not at all).

If you use MAC address filtering to help secure your wireless network, you’ll need to add the Nest Thermostat's MAC address to your router’s access control list. Every router is different, so you’ll need to refer to your router’s documentation for how to do this.

The Nest Thermostat MAC address is found on your Nest Thermostat under SETTINGS > TECHNICAL INFO.

8) Check for wireless interference.

Other devices that operate on a 2.4GHz frequency may interfere with the Nest Thermostat's ability to communicate with your Wi-Fi router/access point.

You should try turning off any devices that may cause interference, then test your Nest Thermostat's network connection. Here are some devices that may cause interference:

  • Cordless phone
  • Baby monitors
  • Microwaves
  • Bluetooth devices
  • Wireless Video equipment

9) Is your router firmware up to date?

Some Wi-Fi features may not be fully supported by all access points.  One way to resolve this issue is to update to the latest firmware version.

If you purchased your router through your Internet service provider (ISP), please contact the ISP’s technical support to confirm that all firmware is up to date.

If you purchased your router yourself, refer to the manufacturer's technical support documentation and resources for instructions to update firmware.