Nest thermostat shows N1 and cannot connect to the Nest service or app, even though Wi-Fi appears connected.

Note: This is a network/service issue, not an HVAC wiring problem.

• Check Nest service status: From a phone or computer, search for Nest/Google Home service status to see if there is a known outage.
• Router reboot: Power-cycle your router and modem. After they restart, reboot the Nest thermostat.
• DNS settings: On your router, try using a public DNS service (e.g., 8.8.8.8 / 1.1.1.1) and reboot the router.
• Firewall/parental controls: Temporarily disable strict firewall rules or parental controls that may block Nest's outbound connections.
• Re-add to app: In the Nest or Google Home app, remove and re-add the thermostat if it remains unreachable, following the in-app pairing instructions.