Got a Nest thermostat and an older hot water boiler. No circuit board(s)., an Aquastat Three Taco zone valves. Nest is replace one zone. Have red and white wires, no green. Got power connector. Where do I attach it? Aquastat or to Zone valve. Thanks
Thanks for posting here in the Community forum and for showing interest in our Nest thermostats. Are you located in North America or Europe? And could you send us a photo of how your previous thermostat was wired so we can take a closer look?
