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Nest 3rd Gen Heat Link has died with error H71

dannycarroll
Community Member

Hi,

as per many other users, my Nest Heat Link no longer works when connected to mains power nor controls the boiler when it is connected via mini USB. As this is a known issue I would appreciate that a replacement be sent out as soon as possible. Thank you!

5 REPLIES 5

Frustratedddd
Community Member

The USB will not do anything, that's not used for power.

I assume you have checked supply to the Live - Neutral terminals at the Heat Link?

Are you in the UK? When did you have the thermostat fitted, how long ago?

Yup, both neutral and live have been checked and have supply, only mentioned the usb as it had been mentioned in passing in similar replies. 

Thermostat was fitted in early 2022, and we’re in Ireland. 

Could well be duff as you say. You say Ireland, if northern then take it back to the shop or installer as they are responsible still. Much quicker than waiting on here if you are.

AlexD
Community Specialist
Community Specialist

Thank you for all the information @dannycarroll . I'm sorry to hear you're facing difficulties with your Heat Link and I'd be happy to try and assist. 

 

Thank you for the suggestions @Frustratedddd , always appreciated. 

 

If you haven't already, check the breakers and switches at the location, to make sure nothing has tripped. Also check the boiler as it can sometimes have a separate switch on it. Confirm it has power, it should have a display or LED that turns on.

If it all looks good try and power cycle the Heat Link, if you're comfortable in doing so. Turn the power to the Heat Link off for a few minutes and then turn it back on. See if it has any reaction after, when you press the button on it. 

Also let us check a few things:

1. When did you first notice this behaviour?
2. Was it installed by a Nest Pro or by a heating/electrical engineer?
3. Did you notice any message on the thermostat display?
4. Did you notice any power cut in the area before this occurred?
5. Did you have any maintenance done on the heating or electrical system recently? 
6. Do you have only one or multiple Google Nest thermostat devices at the location?

 

 

Vladut
Community Specialist
Community Specialist

Hi there, just checking in with you. Did you manage to check my colleague's last message?