Nest thermostat not sending signal to boiler

[KetanP]

Hi all, my thermostat is not sending call message to boiler suddenly after working fine before. Boiler is working as I can get hot water.

Nest seems to look like all working but the boiler and heating not kicking in.

When temperature is changed from low to high, you do hear a click at the boiler but nothing happening.

[zoeuvre]

Hi KetanP, 

Thanks for reaching out to us, and I'm sorry to hear about the situation. Let's sort this out.  

A few questions: Are you located in North America or Europe? What type of Nest Thermostat do you have? Also, could you help us with the power readings of your Nest Thermostat? Kindly go to Settings > Technical Info > Power if you have the Nest Learning Thermostat or the Nest Thermostat E, and to Settings > Equipment > Power Info if you have the Nest Thermostat 2020.

I'll look forward to your response. 

Best,

Zoe

[KetanP]

Based in Europe > UK

the Nest is Gen 3
Power readings as follows;
Battery 0 3.942V
Vusb - 5.11V
Vin0.00V
lin - 200ma (c)

[Vladut]

Thank you so much for all the details. Can you tell me how many zones do you have in your house?

[Paul_R]

Hi there @KetanP! Have you seen the last message that my colleague sent?

[TudorL]

Since I haven't heard from you in a while, I'll close this thread, but if anything comes up, you can always contact our community, as we're a message away. Have a good day and stay safe!