Installing new 2-wire (Single Pole) Thermostats - how to install when there are 3 wires in wall? - Home Improvement Stack Exchange
My thermostat has only two wires. Am I compatible with ecobee?
Thermostat Wiring: How To Wire Thermostat? (2,3,4,5 Wire Guide)
Install 2-wire thermostat in 4-wire box
Thermostat Wiring Explained April 26, 2011 • By The Internet Electrician ShareTweet+ 1Mail In this ar… | Thermostat wiring, Refrigeration and air conditioning, Wire
Wiring ecobee3 to Carrier Edge thermostat with 2 wires : r/ecobee