Nest heat link is dead

[AngmB6]

I'm getting H72 Error message on my thermostat.  The button on the heatlink does nothing when I press it. The boiler is still producing hot water

I see from other posts , the following questions are commonly asked, therefore I have answered below

Turn on Manual Mode to verify boiler activation by pressing its button once. Does anything happen?

- the button does nothing. 

Check that the breaker switches are set to on or the fuse board hasn't tripped.

- everything is fine. The boiler is on the same circuit and the hot water is working. 

1. How often do you experience the issue?

- First time

2. How long has your thermostat been installed?

- purchased May 2020 installed August 2020 due to lockdown in the UK

3. What colour is the Heat Link LED?

- No LED lighting up. 

4. What is showing on the Nest thermostat display?

- H72 Error message

5. Have you had any power cuts recently?

- No

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

- No

7. How many zones are present in the setup?

- one

[CristianC]

Hey @AngmB6,

Thanks for the details. I want to open up a case for you — please fill out this form so I can gather your details securely and let me know once you've done it: https://bit.ly/3oVDg4g. Please include the serial number of the thermostat, your full shipping address and the email address linked to your Nest account. Don't forget to put in your community username as well.

[CristianC]

Hello again. Just checking in. Do you still need my help?