Thermostat and heat link not connecting

[Kubla]

Hi I have a nest thermostat E which has been successfully working for the last few years but as of yesterday I got a message on the thermostat saying it was not controlling devices successfully.

I tried various suggestions online mostly from this forum but with no luck. 

Finally I tried to remove and reinstall from scratch but now the setup fails every time I get to the stage of connecting the heat link to my thermostat. No matter what I try the heat link light will not go blue for more than a couple of seconds then turns off or goes to green.

Can anyone suggest what steps I can take next? Thanks

[Kubla]

Update..have now managed to get the blue light on the heat link but now I am repeatedly getting this error

[Kubla]

Don’t worry….doing exactly the same thing 20 times seems to have done the trick!

[luciaaa]

Hi, @Kubla!

Thank you for reaching out to the community. I understand your Heat Link was not connecting to your Nest Thermostat E. I really appreciate the time and effort you dedicated to troubleshooting both devices repeatedly. I'm glad to hear that the Heat Link is now connected to your thermostat.

Don’t hesitate to reply if you have any questions.

Best regards, 

Ana