Google Nest Community

Klempka · 12-27-2022

I have Nest Learning Thermostat 3rd gen. and Viessman Vitodens 100 boiler. For last 3 years its been connected over OT and worked well. Since about 3 months few times error H73 comes up and says couldn't detect an OpenTherm connection, Check your set...

Klempka · 01-01-2023

I’m not sure if it’s back to normal. Will find out. As well shouldn’t you guys figure out what is wrong with heatlink? Why is it loosing control over OT? Why is it reconnecting and returning to normal after some time? Is there any software or firmwar...

Klempka · 01-01-2023

Thank but No errors on the boiler. I bought different thermostat that works on OT and it worked straight out of the box. anyway, on the same day I posted this tread nest managed to come back to work by itself. It looks like heat link has some reliabi...

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