Nest thermostat shows N2 and fails to connect to the selected Wi-Fi network.

Note: N2 does not affect local HVAC control.

• Re-enter password: Carefully retype the Wi-Fi password on the Nest, paying attention to case sensitivity.
• Check router security: Ensure the router uses WPA2 or WPA3 security and not enterprise authentication or WEP.
• Disable MAC filtering: If your router uses MAC address filtering, add the Nest's MAC address (found under Settings > Technical Info > Network) to the allowed list.
• Reboot router and Nest: Power cycle both devices and attempt connection again.

If N2 persists while other devices connect normally, check for firmware updates on both the router and Nest, or try a different Wi-Fi network.