Heat link has suddenly dead, no light and unable to do anything.

[abellaj]

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Original Poster: Jamie Burchell 2716

Nest thermostat has suddenly come up with an error H71. I’ve checked the heat link and it seems to be dead. No light or anything, there’s power going to it and my boiler. I’ve tried resetting and still nothing.

Only had the system for just over a year!

Tried to contact Google via chat and nothing, also tried Twitter and nothing.

[abellaj]

Hi everyone,

Thanks for reaching out and sorry for the late reply. We're sorry to hear about your Nest thermostats. 

I'd kindly ask all of you to try these steps:

• Does anything happen if you press its button for 30 seconds? 
• 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?
• Make sure the breakers are on or the fuse board hasn't tripped.

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?
2. How long has your thermostat been installed for?
3. What colour is the Heat Link LED?
4. What is showing on the Nest thermostat display?
5. Have you had any power cuts recently?
6. Have you had any work done on your electrical or heating systems recently?
7. How many zones are present in the setup?
8. Is there power present to your boiler?

Once you've tried these steps and if you still have this issue with your Heat Link, please reply to the thread confirming that the steps were carried out, together with the answers for the above questions and we'll make sure to further assist you with this. 

Regards,

Karina

Community Specialist

[KLHS]

Hi,

I am having exact same problem, Heat link LED is dead, Thermostat showing a H71 error.

Was this resolved?

[CristianC]

Hey @KLHS,

Thanks for reaching out. I'll do my best to get this sorted for you as soon as possible.

Here are some helpful troubleshooting steps:

Press the button on the Heat Link and check if you have any lights on it
Check if the circuit breakers and the switches are set to on
Turn them off and then back on
Press on the button again and check for LEDs

Could you also help me with some answers to these questions?

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?


Regards,
Cristian

[CristianC]

Hello again. Just checking in. How's it going with your Heat Link?

[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.