topic Re: Nest therm does not communicate in Nest Thermostats

Nest therm does not communicate

lppant — Fri, 27 May 2022 15:10:07 GMT

My nest learning therm does not communicate with motorized valve.

Re: Nest therm does not communicate

CoolingWizard — Fri, 27 May 2022 19:02:47 GMT

When speak of a motorized valve, how was the old thermostat connected to the motorized valve? Can you post a picture of the old thermostat bas with the wires connected and a picture of the nest base with the wires connected.

Re: Nest therm does not communicate

lppant — Sat, 28 May 2022 14:51:29 GMT

The new Nest thermostat is wall mounted and operating fine with app. It was installed by a technician with a decent fee. He told me to buy a new valve and promised to come back. But never showed up. Doesn't reply my phone call either. I need to operate the valve manually if I want heat which is not bad cause its summer in the UK. But after this guy worked on the system we also stop getting hot water. Now it looks like nothing wrong with the valve. I can see that 3 common blue 24v wires are connected together on the hub. I was not sure if its normal. The previous thermostat was working fine. I am afraid I did not take a picture. Thx

Re: Nest therm does not communicate

CoolingWizard — Sat, 28 May 2022 19:18:35 GMT

Unfortunately here the desert of southern California we have no need for boiler or hydronic heating systems.

Re: Nest therm does not communicate

lppant — Sat, 28 May 2022 21:26:37 GMT

Hiya from England!

Re: Nest therm does not communicate

CoolingWizard — Sat, 28 May 2022 22:28:51 GMT

Hello Back at you

Re: Nest therm does not communicate

AndaD — Wed, 01 Jun 2022 10:44:14 GMT

Hi there @lppant and thanks for reaching out to us. I'm sorry to hear about this, but no worries, we'll find a solution together. Can you tell me if the issue started since the initial installation? Also is there any wiring message showing up on your thermostat's display?

Re: Nest therm does not communicate

lppant — Wed, 01 Jun 2022 11:55:20 GMT

Yes, it was working perfectly fine before the initial installation. The display does not show any error message. Since the initial installation, we have not had hot water. For heating, we need to operate the motorised valve manually to trigger the firing in the boiler. Thx

Re: Nest therm does not communicate

CristianC — Wed, 01 Jun 2022 12:20:36 GMT

Hey @lppant. It sounds like the Heat Link is not wired properly. Do you hear a click sound coming from the Heat Link when you turn the heating on/off?

Re: Nest therm does not communicate

lppant — Thu, 02 Jun 2022 08:09:37 GMT

Yes, it looks like the sound is coming. I double-checked it by boosting hot water for the next 30 mins and hear the click.

Re: Nest therm does not communicate

CristianC — Thu, 02 Jun 2022 08:13:03 GMT

That's good news. It means it's working as expected and it's sending the signal to your boiler. I'd recommend asking an installer to check the wiring.

Re: Nest therm does not communicate

lppant — Thu, 02 Jun 2022 08:36:58 GMT

Yes, that's a real challenge. The installer gave up. I mean the guy who installed the thermostat stopped responding to my calls. I have another guy who visited once and he promised to come back. Let's hope he will do the magic. Thx

Re: Nest therm does not communicate

CristianC — Thu, 02 Jun 2022 08:47:44 GMT

I'm sorry to hear that. You can try contacting a Nest Pro here.

Re: Nest therm does not communicate

AnaM — Sat, 04 Jun 2022 12:53:00 GMT

Hey there,

Just checking, do you need any further assistance?

Re: Nest therm does not communicate

DragosC — Mon, 06 Jun 2022 12:57:22 GMT

Since I haven't heard from you in a while, 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!