Thermostat won't power up. Charged with usb port and lite turns green.
Message says attach to base, but when I do, red lite starts blinking and
eventually goes off but thermostat never turns on. System has 24 vac and
old thermo works fine. Help?
I have hot water system with thermostat controlling a zone valve.
Currently have a W, RH, And A connection; Don't know where tp put A wire
on nest thermostat?
