Got this resolved too. Got my installer to replace heat link too when
replacement parts came in, worked first time. Seems that they have to be
done as a pair, you can't mix and match units. It's also apparently a
known issue that the wi-fi chips just...
Hi GarrettDS. WiFi on unit was dead so arranged for new unit. New unit
could see WiFi immediately, ironically now it can't connect to heat link
wirelessly, more resetting and or replacement required I guess!
Similar issue here - nest dropped offline after a few months, no amount
of restarting or hard resetting will resolve. It cannot find *any*
networks, including a phone hotspot right beside it - seems like a
hardware issue
