![heat pump - System has Orange, Blue and White wires.. but thermostat does not have a place for each! - Home Improvement Stack Exchange heat pump - System has Orange, Blue and White wires.. but thermostat does not have a place for each! - Home Improvement Stack Exchange](https://i.stack.imgur.com/sRkZv.jpg)
heat pump - System has Orange, Blue and White wires.. but thermostat does not have a place for each! - Home Improvement Stack Exchange
![hvac - Why are the white and orange wires both connected to my thermostat's W terminal? - Home Improvement Stack Exchange hvac - Why are the white and orange wires both connected to my thermostat's W terminal? - Home Improvement Stack Exchange](https://i.stack.imgur.com/Oj6vW.jpg)
hvac - Why are the white and orange wires both connected to my thermostat's W terminal? - Home Improvement Stack Exchange
![hvac - Where to connect common wire from thermostat to First Co. air handler? - Home Improvement Stack Exchange hvac - Where to connect common wire from thermostat to First Co. air handler? - Home Improvement Stack Exchange](https://i.stack.imgur.com/SrTon.jpg)