Network Keeps Disconnecting / WiFi Drops

How to Fix It

1. Check the Google Home app event history.

   Open the Google Home app → your home → select the Nest WiFi router → Settings → Activity. Look for 'Internet offline' events — these confirm the internet connection itself dropped, not just WiFi. Note the times and frequency — this log is useful when calling the ISP to document the instability.

2. Inspect the modem for drops.

   Log into the modem's admin page (try 192.168.100.1 for cable modems) and check the event log. Look for 'T3 timeout', 'T4 timeout', or 'loss of sync' entries — these indicate the modem is periodically losing contact with the ISP. A modem that drops sync every few hours causes the Nest WiFi network to briefly go offline at each sync loss.

3. Restart all devices in the correct order.

   Unplug the modem, then all Nest WiFi devices. Wait 30 seconds. Plug the modem in first and wait for it to establish a stable internet connection. Then plug in the Nest WiFi router, wait for it to come online, then plug in the Nest WiFi points.

4. Reserve IP addresses for critical devices.

   DHCP lease renewals cause a brief interruption when a device receives a new IP address. In the Google Home app, select the device → IP address → Reserve. This assigns the device a permanent IP address and prevents lease renewals from interrupting active connections.

5. Update Nest WiFi firmware.

   In the Google Home app, check for available firmware updates for the Nest WiFi devices. Nest WiFi updates automatically but can be forced: Settings → More settings → Updates. Apply any pending update — newer firmware often includes stability improvements that reduce disconnection events.