Hello Sung1,
I'm sorry to hear that you're experiencing issues with your Nest Thermostat connecting to the network. Let's try to troubleshoot the issue together. Here are a few steps you can follow for the Nest Thermostat offline article:
- Ensure that your Wi-Fi network is working properly and that there are no issues with the internet connection. Try connecting other devices to the same network to verify its stability.
- A simple router reboot can solve connectivity issues. Unplug your router, wait for a minute, and then plug it back in. Allow it to fully restart and try connecting your thermostat again.
- Check your thermostat settings for any message codes that could be a potential issue with it disconnecting from the Nest app.
- Electronic devices, walls, or other obstacles can interfere with Wi-Fi signals. Make sure there are no new devices or changes in your home that might be causing interference.
- If the issue persists, you may want to consider resetting your Nest Thermostat. Follow the instructions for a factory reset, and then set it up again from scratch.
Let us know how it goes.
Best regards,
Mark