Google Nest Thermostat H71 Error

Happened to both of mine earlier this year within a couple of weeks of each other. Google replaced both under warranty thankfully.

Seems to be a common issue, at the time there was a new person posting in the google forums everyday with the same problem.

I had it within a day or two. I went through the web chat rather than the phone.

They gave a new thermostat and heatlink both times rather than just the heatlink on its own.

They put a lock of the price of the item on my credit card until I sent the old one back (they gave a return label for me to print out and UPS just picked up the package from my house).

No bother, hope you get sorted out!