Heat link failure

[Arv1]

Hi Nest, 

I have an issue with the heat link, stopped supplying power to thermostat. Had electrician test heat link and confirmed there is no power out of unit. Cables are sound.

[DragosC]

Thanks for letting us know, @Arv1

Could you tell me please when did the situation start occurring first and when was the thermostat installed?

Also, please answer to the following questions:

Are there any lights on the Heat Link? Does the boiler activate when calling for heat by pressing the Heat Link's button to activate Manual Mode?
Are you seeing any wiring report or error on the thermostat and/or the app?
Have you had any recent power cuts in your area? If yes, has the power been restored?
Have you recently had service or maintenance on your electrical, plumbing, or heating system?
If yes, how long was the power off for? (Be specific.)
Could you tell us please if you've checked on the breaker switch and fuse box?
Any blown fuse in there? Have you tried to turn the breaker switch off and on again? Any difference?

[AlexD]

Hi, I wanted to check in. Do you need any further assistance? If so, make sure to let me know. 

[DragosC]

Since I haven't heard from you in a while, I'll have to close this thread. Should anything else come up, please open another thread and we'll take it from there. Have a good one and stay safe!