OK - this a rather long reply as I am sending you a copy of an email I
received from Google Nest customer support after I telephoned them last
Sunday. I followed their instructions we arranged for a temporary fix
and have now had our heatsink deliver...
Please see my answers to your questions in bold below - I have already
answered these elsewhere. If you can make further suggestions that would
be helpful. What type of Nest thermostat do you have?- Hub generation 3
When was it installed? - circa 18t...
Either that or get it replaced. Google clearly know the UK have a
problem - there is an announcement on their website. The contractor they
have engaged to deal with this is pretty unresponsive! I am about to
have the system removed and replaced with ...