Google Nest Community

After much troubleshooting, it turns out the Nest has gone bad. Is there a program to turn it in for refurbishment for credit for a new Nest?

I have had the same Nest for several years and have used it without issues. Today, the air handler fan turns on and off randomly at around 30 second intervals. This happens every 5-10 minutes. There is no indicator showing that the fan is running. Th...