topic Re: Nest Heat link fault ? in Nest Thermostats

Nest Heat link fault ?

tbec407 — Fri, 05 Aug 2022 21:55:12 GMT

I have a nest learning thermostat with I believe a gen 3 heat link

As it is summer I have not had the heating on so only just realised the thermostat has not been working.

I have no power to the thermostat from the heat link, I have tried all the reset procedures, power off holding bottom 20 seconds etc

No lights on the heat link unit of any kind even though there is 240v to it 100% checked. No 12volt power leaving the heat link also 100% checked

the thermostat does charge from a alternative power supply and give error code h72 no power to thermostat

Would like to know the quickest way to get a replacement heat link

Many thanks

Re: Nest Heat link fault ?

tbec407 — Fri, 05 Aug 2022 20:50:08 GMT

Re: Nest Heat link fault ?

george_t — Sat, 06 Aug 2022 11:36:17 GMT

Hi @tbec407. I'm sorry to hear you're experiencing this issue, but we'll sort this out together. Let's start with a few questions:

Did the issue happen during installation or after installation? Was it installed by a Nest Pro or by a regular installer?
Does the boiler activate when calling for heat by pressing the Heat Link's button to activate Manual Mode?
Are you seeing any wiring report or error on the thermostat and/or the app?
Have you had any recent power cuts in your area? If yes, has the power been restored?
Have you recently had service or maintenance on your electrical, plumbing, or heating system?
Have you tried any troubleshooting steps before contacting us?
How many thermostats do you have?

Re: Nest Heat link fault ?

tbec407 — Sat, 06 Aug 2022 14:57:42 GMT

Thanks for taking the time to reply

heat link button does nothing

no power cuts, power in house was switched off to have a plug facia changed a few weeks ago power is on

I don’t know when it stopped working as my heating is currently off as it’s summer

All trouble shooting tried !

There is 240v power to the heat link confirmed with a volt meter, however no power is leaving the heat link (12v ) to the thermostat on

Hot water works fine all through house one thermostat in house

Re: Nest Heat link fault ?

tbec407 — Sat, 06 Aug 2022 14:58:24 GMT

Installation was 20 months ago with a new boiler

Re: Nest Heat link fault ?

tbec407 — Sat, 06 Aug 2022 14:59:18 GMT

Re: Nest Heat link fault ?

george_t — Sun, 07 Aug 2022 11:34:48 GMT

Thanks for the details and photo. I've reached out to you through email on the address associated with your forum profile. I hope to hear from you very soon.

Re: Nest Heat link fault ?

DragosC — Tue, 09 Aug 2022 11:47:25 GMT

Hi there. I'm just following up on our last message. Do you still need our help? Keep us posted.

Re: Nest Heat link fault ?

tbec407 — Tue, 09 Aug 2022 12:09:56 GMT

i have been on the Google next live chat

My heat link is less than 2 years old so they have arranged for a free replacement to be fitted tomorrow by “Boxt”

Re: Nest Heat link fault ?

DragosC — Tue, 09 Aug 2022 12:35:30 GMT

Understood. Thanks for letting us know. In this case, I'll have to close this thread. Should anything else come up, please open another thread and we'll take it from there. Have a good one and stay safe!