Radiators heating up when hot water turns on (but heating is on off)

[martij20]

Hi There

I had a new 3rd Gen Nest Thermostat installed in winter 2023 via google replacement programme as fault developed with old nest system.

I turned heating off completely in the summer 2023 but noticed that when the hot water switches on, the radiators also get warm even though the heating is switched off.

So I got a plumber to check and he replaced the hot water / central heating switchover valve but this has not resolved the issue.  He says that it can only now be an issue with the Nest system which may have not been wired up correctly or a technical fault?

Any ideas?????

[EmersonB]

Hello martij20

Thanks for reaching out here in the Community. To know more about this issue, I'd like to confirm, where are you located? Please go to settings> Technical Info> Power and get all the information there and post it here. Who installed your Nest Thermostat? Do you still have the wiring configuration of your old Thermostat? Let us know your update here.

Best,

Emerson

[EmersonB]

Hi martij20,

I wanted to follow up and see if you are still in need of any help. Please let me know if you are still having any concerns or questions from here, as I would be happy to take a closer look and assist you further.
   
Regards,
Emerson

[martij20]

Hi Emerson

We are based in the UK.  It was installed by Boxt engineer (google approved installer) in January this year.  Let me know what other info you need.   Thanks for looking into this.  Cheers

[LarisaL]

Hi there! I just sent you an email on the email that you have here in Community, please let me know once you've done the instructions. 

Many thanks, Larisa.

[LarisaL]

Hi there, just checking in! Did you see the message from above?

[UanaC]

Hey there, I haven't heard from you in a while so I'll be locking this thread. If you have any new issues, updates or just a discussion topic, feel free to start a new thread in the community. Thanks, Oana.