W 2 Wire Thermostat Wiring Diagram Carrier. Basic heat pump thermostat wiring and wire colors for thermostat wires r red wire to the r terminal g green wire to the g terminal y yellow wire to the y terminal w white wire to the w term. Alexa smartthings google home ifttt rthwf all you need to know about thermostat wiring including thermostat wires color codes wiring diagrams and videos to make your diy easier.
Wiring in trane terminal from left to right. O orange wire to the o terminal for the reversing valve although a few manufacturers use the b terminal for the reversing valve rheem and ruud. Orange wire to o.
We do not cover 110240 volt thermostat wiring and millivolt thermostat wiring issues.
Wiring in trane terminal from left to right. This wire provides the return path for the power that flows through the red wire and through the internal circuitry of the thermostat. We address them in order from most common to least common. The extra expense isnt excessive though.