H71 error on heatlink. No lights coming on

[Tom85]

My heat link is dead. I can't even reset as no lights come on. I'm an electrician and all power to unit and connections are fine. How do I get a new heat link?

[TudorL]

Hi there and thanks for reaching our community. I'm sorry to hear about your issue, but I'll do my best to assist you. I'll need to document the case a bit, so please follow the instructions and questions below: 

Press the button on the Heat Link and check if you have any lights on it

Turn them off and then back on
Press on the button again and check for LEDs

How long has your thermostat been installed for?

Did the issue happen during the installation?

Is there any error on the Nest thermostat display?

Have you had any power cuts recently?

Have you had any work done on your electrical or heating systems recently?

If yes, was the power properly restored at the fuse board after work was done?
How many zones ( thermostats ) are present in the setup

[Tom85]

Press the button on the Heat Link and check if you have any lights on it

No

Turn them off and then back on

Press on the button again and check for LEDs

No lights working 

How long has your thermostat been installed for?

3+ years

Did the issue happen during the installation?

No

Is there any error on the Nest thermostat display?

H71

Have you had any power cuts recently?

No

Have you had any work done on your electrical or heating systems recently?

No

If yes, was the power properly restored at the fuse board after work was done?

How many zones ( thermostats ) are present in the setup

1

[LarisaL]

Hi there, thank you for the answers. Would it be okay with you if I sent you an email on the email address you have here on Community?

[Tom85]

Yes please

[LarisaL]

I just sent you the email. Please let me know when you completed the form.

[Tom85]

Hi there, I completed the form 

[AlexD]

Awesome. I found the form. I sent you more information over email. Reply to it when you are able. 

[Tom85]

Just replied to that

[Vladut]

Hi there, just checking in with you. Do you still need help?

[TudorL]

Hi there @Tom85, just checking if there's anything else me or my colleagues can do for you. 

@GabboCH we'll continue the conversation on the thread provided by you here, if it's okay for you as well. 

[GabboCH]

Hello Tom/LarisaL, can you say what the resolution was?
I have the same problem with one of my heat-links since last week, is it possible to order a replacement rather than a complete unit with thermostat?

[Vladut]

Hi @GabboCH ,

Can you tell me if you press the Heat Link button for 30 seconds, does any light come on?

[GabboCH]

Sorry for the slow reply.
I have just replied to one of your other colleagues in another thread I created with some details.
Nest EU Thermostat Heat Link is Dead/No Power - Google Nest Community

The reset button does nothing even if pressed for 30s.

[LarisaL]

Hi there, just checking in! Have you seen the message from my colleague?

[GabboCH]

Yes, I already completed the support request details sent by your colleague through the other thread. Just waiting for the next steps...

[AlexD]

Thanks for letting us know. You should soon see an email with further details from my colleague.