I recently had an annual revision of my boiler performed, and was advised that my Google Nest was wired wrong. Apparently, it is wired to OpenTherm despite the boiler not being OpenTherm, and this is dangerous. However, this technician was not familiar with Nest and tried rewiring to 1&2/ 2&3, but this failed. So I am not sure whether to trust the technicians who installed the Nest or the annual revision guy.
If a non-OT boiler is wired to Nest via OT, how dangerous is it?
The Nest Learning Thermostat (third generation) does support OpenTherm according to the Google support pages (https://support.google.com/googlenest/answer/9259109). 🙂
Currently, my third-generation is connected by using OpenTherm.
Do you have a third-generation learning thermostat?
If you don't know here is a LINK on how to check which version you own.
Yes the thermostat is compatible with OT. As I mentioned, the issue is with compatibility with the boiler, which is apparently not OT compatible. What would be the danger of wiring via OT if the boiler is not suited?
One technician installed via OT, and the other said this is wrong and dangerous because the boiler is not OT. I am trying to figure out who is correct.
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 trouble from here, as I would be happy to take a closer look and assist you further.
Thanks for the response. I agree with Mel's response. I would suggest reaching out to our Nest Pro technicians so they could take a closer look at your system and advise you about installing a non-OT boiler. You can click on this link to learn more about our Nest Pro services.
Just one quick final check in here since activity has slowed down. We'll be locking the thread in the next 24 hours, but if you still need help, I would be happy to keep it open. If there's more we can do, just let me know.