How to pair the Nest thermostat and Heat Link

Pair a replacement Heat Link

You may get an H71 error code on your thermostat if your Heat Link can’t connect to your thermostat. If you needed to get a replacement Heat Link from Google Support, follow the instructions below to install and pair your new Heat Link to your thermostat.

1. It’s recommended that you have a professional installer install your Heat Link, but you can download the installation guide for detailed instructions. Once installed correctly, you can address the error code.
2. On the H71 error code screen on your thermostat, select Replace Heat Link.
3. Wait until the light on the Heat Link is blinking blue then select Continue.
4. Enter the pairing code and tap Connect. Check the bottom of Heat Link for the 6-character code.
5. Once paired, if your thermostat is showing an error code, visit our article about thermostat error codes for further troubleshooting.

Pair a replacement Nest learning Thermostat display

If your Nest Learning Thermostat display has been replaced with a new one, it will need to be connected to the app.

1. Remove your old Nest Learning Thermostat display from the app.
2. Go to Settings   Add product and follow the instructions to add it to the app.
3. When prompted, enter the pairing code from the Heat Link in the thermostat display.