topic Re: Heat link stopped working in Nest Thermostats

Heat link stopped working

Florian1 — Mon, 03 Jul 2023 08:13:47 GMT

Hi,

Unfortunately Heat Link stopped working, there is an H72 error on the thermostat (3rd Gen)

The power supply of the heat link is OK (N and L electric plug) but nothing going to the thermostat and boiler (T1-T2 and 1-2), on he more the heatlink itself behaves strangely --> doesn't switch on will normal 220v DC in.

What can I do ?

Well if I need to buy a new one I will change the brand because I am totally unsatisfied with the reliability of these after few years

SN is 09AC01AC361903GS

Thank you

Re: Heat link stopped working

CGNottingham — Tue, 04 Jul 2023 10:26:05 GMT

I have what appears to be exactly the same problem, which also started yesterday.
I’m very interested to see what is suggested to you.
Having had a faulty device which was replaced at time of installation and now this problem, I’m not confident in Nest’s reliability.

Re: Heat link stopped working

Vladut — Sat, 08 Jul 2023 08:25:47 GMT

Hello @Florian1 @CGNottingham ,

Thank you so much for reaching out. I just read your posts and this is a strange behavior. Can you tell me if you see any lights on the Heat Link?

Re: Heat link stopped working

CGNottingham — Sat, 08 Jul 2023 08:37:41 GMT

No lights at all.
Have to commend Google (Nest) customer service. A five minute telephone call sorted out an out of guarantee free of charge replacement which took place within 24 hours by a Boxi engineer.

Re: Heat link stopped working

Vladut — Sat, 08 Jul 2023 08:50:15 GMT

Hello @CGNottingham thank you so much for the update. It's so good to hear that everything was sorted. Let me know if you need anything else.

Re: Heat link stopped working

Florian1 — Mon, 10 Jul 2023 08:24:07 GMT

Hi, it does when I plug it with a USB charger.

Re: Heat link stopped working

Paul_R — Mon, 10 Jul 2023 08:28:58 GMT

Hi there @Florian1! Thanks for letting us know. Can you please respond to the following questions and try the steps at the end, but before you do, please unplug the USB cable from the Heat Link.

How many zones are present in your setup?
Were there any power outages lately?
Are all the breaker switches on?

Turn the breaker switches off and then on again.
Turn on manual mode by pressing the button of the Heat Link.

Re: Heat link stopped working

Browny1972 — Mon, 10 Jul 2023 09:47:15 GMT

Hi, I’m having the same problem, my heat link is dead, non responsive, no lights. Power supply is present to the heat link.

Re: Heat link stopped working

Paul_R — Mon, 10 Jul 2023 09:50:04 GMT

Hi there @Browny1972! I'm really sorry to hear about this, but I'll do my best to assist you. Can you please respond to the questions, and try the same steps I provided in my previous message?

Re: Heat link stopped working

Browny1972 — Mon, 10 Jul 2023 10:01:35 GMT

Hi Paul, I have actually gone through all the steps, heat link is dead. Only have the one thermostat and heat link.

Re: Heat link stopped working

Paul_R — Mon, 10 Jul 2023 10:02:35 GMT

Alright then, can I send you an email in order to create a case in our system?

Re: Heat link stopped working

Browny1972 — Mon, 10 Jul 2023 10:10:18 GMT

No power outages recently, some really bad thunderstorms on Saturday night!

Re: Heat link stopped working

Browny1972 — Mon, 10 Jul 2023 10:15:47 GMT

My error code is H71

Re: Heat link stopped working

Paul_R — Mon, 10 Jul 2023 10:23:26 GMT

Thanks for the information. I'll have to send you an email with a form in order to create a case for you. Please send a message here in order to let me know when you've completed the form.

Re: Heat link stopped working

Browny1972 — Mon, 10 Jul 2023 10:24:54 GMT

Ok thats fine. Do you require my email address??

Re: Heat link stopped working

Paul_R — Mon, 10 Jul 2023 10:26:46 GMT

I have already sent it, as I can see the email on your profile.

Re: Heat link stopped working

Browny1972 — Mon, 10 Jul 2023 10:34:48 GMT

I have filled out the form

Re: Heat link stopped working

Paul_R — Mon, 10 Jul 2023 10:39:06 GMT

Thanks, I managed to find it. We'll have to continue the conversation through emails from now on, so please check the last one I sent you.

Re: Heat link stopped working

Florian1 — Mon, 10 Jul 2023 15:33:59 GMT

Hi, I have no access to the email address in my profile, would you please sent it to:

fdemail

yahoo

.fr

Re: Heat link stopped working

Paul_R — Mon, 10 Jul 2023 15:33:23 GMT

Sorry @Florian1, I'm not sure what you're trying to say. If you mean that you'd want to be sent the form as well, I'll need to ask you to kindly answer to the questions and confirm that you've tried the steps that I recommended,