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Nest thermostat will not connect to app

Community Specialist
Community Specialist

Disclaimer: This thread was migrated from our previous version of the Google Nest Community. You can continue to receive updates on your thread issue here or simply ask, browse or more in the new Google Nest Community.

Original Poster: Timothy Woodson 

I'm trying to connect my nest thermostat to app. I have resetted device and wifi nothing help


Community Specialist
Community Specialist
Hi Timothy, 
Credit to a user from our Nest community: You may have to update your router settings to assign a static IP address (DHCP reservation) to your Nest. When a device connects to your home network, it is assigned an IP address. By default, that address is given an expiration date (usually a few hours). When the expiry time nears, the router will ping the device and if no response is made, the router will flag that IP as being available to assign to the next device that attempts to connect to the network. This is where the issue lies - when the Nest is pinged, it won't reply, thus "freeing" up that IP. The second link provides a thorough guide explaining how to assign a static IP address in full. 
If someone comes to your house with a wifi enabled cell phone, the IP that was (is) assigned to the Nest will be transferred to that new device, and your Nest will appear offline on your app. 
Let me know if this works out for you! I hope it resolves your issue, but if it doesn't, we'll continue on. 🙂 
-From Ai, Community Specialist.