Heatlink not working H72

[Buckledrapier2]

I am also having the same issue as many others, heatlink is dead, thermostat shows H72 error code.

I have read the other links and carried out procedures as advised but no luck

• Does anything happen if you press its button for 30 seconds?   Nothing
• In some cases the boiler will have an additional isolation switch which can turn off the power to both the Heat Link and the boiler. Can you try switching that off/on again to see if anything changes?  Done – no change
• Make sure the breakers are on or the fuse board hasn't tripped.  Reset everything – No Change

Moreover, to have a better view over each of your cases, please help us with some answers:

1. How often do you experience the issue?  Once
2. How long has your thermostat been installed for?  Unknown, recently bought house, already fitted
3. What colour is the Heat Link LED?  No Lights
4. What is showing on the Nest thermostat display?  H72
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
8. Is there power present to your boiler?  Yes

Help required, please

[AlexD]

Hi @Buckledrapier2 . I would be happy to try and assist. 

I am happy to see you already did so much troubleshooting, your quite a few steps ahead.

Fill out this form so we can gather your details securely, and let me know once you've done it https://bit.ly/3oVDg4g . Make sure to include the display serial starting with 09A, the email associated with your Nest account and your full post address. Also make sure to include your username as I will use that to locate the form once you let me know it is done.

Alternatively if you are more comfortable you can get in touch with our support line by using this link: https://bit.ly/3kIfrO5 . Just provide them the same details and they will be able to assist.

Best regards,

AlexD

[AlexD]

Hi @Buckledrapier2 , I wanted to check in. 

Do you still need assistance with your device or did you manage to get in touch with my colleagues? 

Make sure to let me know if you need any further assistance. 

[shadowrider]

@AlexD I have the exact same problem.

Purchased Google Nest Learning Thermostat, 3rd Generation, on 24 November 2019 (Amazon) Installed by UK Nest Pro Installer and has been working perfectly until today 10 November 2021. The Nest Thermostat reports Error H72 Heatlink No Power. The Nest Thermostat Base Unit (located next to the UK combi-boiler) appears to have no power, the combi-boiler has power and is working correctly.

Nest Thermostat Error CodeBase unit LED off

• Does anything happen if you press its button for 30 seconds?   Nothing
• In some cases the boiler will have an additional isolation switch which can turn off the power to both the Heat Link and the boiler. Can you try switching that off/on again to see if anything changes?  Done – no change
• Make sure the breakers are on or the fuse board hasn't tripped.  Reset everything – No Change

Moreover, to have a better view over each of your cases, please help us with some answers:

1. How often do you experience the issue?  Once
2. How long has your thermostat been installed for?  November 2019
3. What colour is the Heat Link LED?  No Lights
4. What is showing on the Nest thermostat display?  H72
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
8. Is there power present to your boiler?  Yes

Help required, please!

[CristianC]

Hey @shadowrider,

Good job with the troubleshooting. I want to open a case for you. Can I send you an email to the address linked to your community profile?

[CristianC]

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

[CristianC]

It's been a while since this thread was last updated so I'll go ahead and lock this thread. If you're still experiencing problems, please feel free to start a new thread and we'll be happy to help.