2 Nest thermostats. One starts heating OK, the other only starts water

[Startsteve]

I have a setup with two Nest Thermostats. One controls (1) Heat + Water and the other (2) only heat. Thermostat (2), starts the boiler (gas), when I increase temperature... No pb there. Thermostat (1) will start Water, but will not start Heating (??). I hear the little "click" when I increase the temperature, but the pump will not start. I have done various resets, restart...etc and no luck... Any suggestions?

[TudorL]

Hi there and thanks for reaching our Community. I'm really sorry to hear about your issue, but I'll do my best to help you out.  Thanks for all the information you provided so far.  By any chance, did you try to press on the button on the Heat Link to see if the Manual Mode activates the heating? 

[UanaC]

Hello there! Just checking in, did you see my colleagues previous message?

[Startsteve]

Hello. Thanks for the reply. If I press the heat link it starts both the water and the heat. So yes heat comes on. What is strange is that when a heat command comes on its own, it doesn’t start the boiler. If the water is already ON, and I increase the temperature, the radiators heat up. I have another thermostat, which only controls heating and it works without having the water heat ON…

[UanaC]

Understood. Form everything that you've explained to us it looks like there is a problem with the valve connected to the thermostat 1. It might be a stuck valve. I would suggest for you to get in touch with an installer regarding this issue. If that does not work, you can get in touch with us via phone or chat. You have the working hours below:

Thermostats: +44(0) 808 169 2307 - Available 08:00 - 19:00 GMT Monday to Friday and 09:00 - 17:00 Saturday and Sunday. 

[AlexD]

Hi, I wanted to check in. Is there anything else I can try and assist with? 

[LarisaL]

I haven't heard from you in a while so, if you have any new issues, updates or just a discussion topic, feel free to start a new thread in the community. Thanks, Larisa.