We have had problems with the second heatlink on Google Nest learning thermostat (after the first was replaced under warranty by the supplier). I tried to contact Google but was put through to the USA who transferred me back to UK so after 2 or 3 minutes I gave up. Clearly unhappy I just want to disconnect it and find an alternative that lasts more than 2 years. The first was bought in January 2022, so after less than 3 years we have had 2 failures. As a retired computer engineer with a background in electrical engineering and electronics I think I do know a little about how to set things up, and as this is the second time around I do not intend to give it a third!