Sometimes the cables will cross.
Collection of 2 wire thermostat wiring diagram heat only. Ecobee thermostats require a c common wire to power on.
Forced Air Outdoor Wood Burning Furnaces And Boilers
Cb57e House Thermostat Wiring Diagrams 5 2 Electrical Only
Wy 2890 White Rodgers Zone Valve Wiring Typical
