How to Install WIFI Smart Thermostat on Vaillant bojler and controlling by Amazon Alexa 

The thermostat has been waiting a long time to be installed. Vaillant service did not want to install it. Their a thermostat in Bosnia costs ten times more. With the help of this youtube clip, I installed it myself. Thanks to the author. Thank you very much!

Great video, thank you! You saved me so much time❤️

Thanks man, I’ve bern looking for this wire connection for some time

Thank you so mu!ch for the connection instructions e.g. bridging .

Awesome your a legend !!!