topic Can't get replacement thermostat to connect to heatlink in Nest Thermostats

Can't get replacement thermostat to connect to heatlink

wylao — Thu, 28 Mar 2024 19:18:43 GMT

My previous thermostat had a wifi hardware/chip issue so a new thermostat was sent out to me...

I can't, for the life of me, get the new thermostat to connect to the original heatlink!

Please help!

Thank you!

Re: Can't get replacement thermostat to connect to heatlink

Frustratedddd — Fri, 29 Mar 2024 00:06:45 GMT

What have you done so far to try and connect the H/L to the display?

What do you see on the display, and what colour lights on the H/L?

Any error code on the display, ie H71?

Re: Can't get replacement thermostat to connect to heatlink

wylao — Fri, 29 Mar 2024 06:42:28 GMT

Yeah I have the H71 error and my H/L is largely slow pulsing blue.

I’ve found the code on the H/L and tried the restarting piece I think but potentially doing something wrong?

Advice most welcomed. Do I need to do anything with the Wifi for example?

Re: Can't get replacement thermostat to connect to heatlink

Frustratedddd — Fri, 29 Mar 2024 08:13:33 GMT

The reason you are in this position is you now have a none matched pair. Meaning your display and heat link are not linked together from the manufacturer.

You need to do the following…..Press the H/L button and keep depressed for 35 seconds or more, do not release the button at all. You will see the light on the H/L go on off, flash whatever, ignore that and keep the button depressed. Around the 35 second time you will see the blue light start to pulse, still keep the button pressed until you are happy the blue light is pulsing. You can keep depressed for ever, you just need to make sure it’s pulsing at that time not before. Do that procedure twice.

You will also need from the H/L the 6 digit code, make sure you have the correct one. Check the numbers match both on the screw by the cover, and the one by the left hand fixing screw. They must be the same, if not use the one by the left hand fixing screw.

Now go to your display and remove from the base. Squeeze the display from the screen to the back together and keep like that until the display goes off and you see the little house, then release. Let the display do it’s thing until you see the screen stable. Do that twice.

Now at the display look for “Replace Heat Link” Click that and follow the instructions.

With luck you should be able to pair them together

Re: Can't get replacement thermostat to connect to heatlink

wylao — Fri, 29 Mar 2024 08:49:45 GMT

Thanks a lot. Will give a go.

Is the left hand fixing screw within the heat link? ie do I need to take the front cover off?

thanks

Re: Can't get replacement thermostat to connect to heatlink

Frustratedddd — Fri, 29 Mar 2024 08:52:52 GMT

Yes that’s correct. The only reason I advise this, because sometimes the lid gets replaced and the number would be incorrect for pairing.

Re: Can't get replacement thermostat to connect to heatlink

wylao — Fri, 26 Apr 2024 20:18:36 GMT

This hasn’t worked unfortunately. Anything else you’d advise?

thanks

Re: Can't get replacement thermostat to connect to heatlink

wylao — Mon, 29 Apr 2024 14:50:22 GMT

Just checking in to see if any has any advice here?

Thanks

Re: Can't get replacement thermostat to connect to heatlink

Frustratedddd — Mon, 29 Apr 2024 15:28:27 GMT

Are you still trying to get this thermostat to work after a month?

Can you confirm the following.....What do you see on the display, any error code, do you still have the H71 code?

The Heat Link, what colour light do you see?

Your thermostat is it wired or wireless or both?

Did you do everything I said above?

Re: Can't get replacement thermostat to connect to heatlink

wylao — Mon, 29 Apr 2024 15:52:14 GMT

I was away for 3 weeks.

I still get the H71 code yes after unsuccessful pairing.

The Heat Link will pulse blue when I do the resetting.

Thermostat is wireless.

Yes, I followed your instructions directly.

Re: Can't get replacement thermostat to connect to heatlink

Frustratedddd — Mon, 29 Apr 2024 16:56:44 GMT

OK, can you confirm the following......

What is the 6 digit code on the Heat Link by the screw cover fixing, and is that the same as the one by the left hand fixing screw inside the cover?

You have the H71 screen, in Tech - Heat Link - what is the 6 digit number show there?

We will move onto another option once you have confirmed those details.