Thanks for stopping by the Google Nest community. To get the best support with warranty or potential device replacement, I'd recommend that you contact the Google Nest support team directly. In the meantime, here are some steps you can try:
Thanks for bringing this up. Appreciate @davidking for helping here.
I know how hard it is to not have a working device when needed - we'd love to help. We'll need some more details from you. Please go to this link and fill up all the information needed, so we can assist you further.
Let me know once done.
It looks like we have come to a solution so I'm going to be locking this thread. If you have any other concerns or questions, please feel free to create a new thread.
Have a great day.