Newbie: Any way to add a c wire to existing transformer or wires? Do I need a new transformer with a “c” terminal? (Trying to connect a Wi-Fi thermostat to control boiler) :
Honeywell Z wave 4 way wiring questions - Devices & Integrations - SmartThings Community
Honeywell Home C-Wire Adapter White CWIREADPTR4001/E - Best Buy