![Installing new 2-wire (Single Pole) Thermostats - how to install when there are 3 wires in wall? - Home Improvement Stack Exchange Installing new 2-wire (Single Pole) Thermostats - how to install when there are 3 wires in wall? - Home Improvement Stack Exchange](https://i.stack.imgur.com/JmTci.jpg)
Installing new 2-wire (Single Pole) Thermostats - how to install when there are 3 wires in wall? - Home Improvement Stack Exchange
![Trying to replace this old 2 wire thermostat for a newer digital one. Problem is older unit does not have leads labeled or which cable is which. Any help on how to Trying to replace this old 2 wire thermostat for a newer digital one. Problem is older unit does not have leads labeled or which cable is which. Any help on how to](https://i.redd.it/j9mnonzn7nu91.jpg)
Trying to replace this old 2 wire thermostat for a newer digital one. Problem is older unit does not have leads labeled or which cable is which. Any help on how to
![I currently have 2 wires coming from furnace. Ecobee says: Based on your wiring selection of Rh and W or W1 your home is compatible with ecobee, but you will need to I currently have 2 wires coming from furnace. Ecobee says: Based on your wiring selection of Rh and W or W1 your home is compatible with ecobee, but you will need to](https://preview.redd.it/rfv8w700xryz.jpg?width=640&crop=smart&auto=webp&s=486a23a998541bc1db46f9057315455e3b5411e8)
I currently have 2 wires coming from furnace. Ecobee says: Based on your wiring selection of Rh and W or W1 your home is compatible with ecobee, but you will need to
![2-Wire heat only furnace for Nest E. The Nest is having problems staying powered. Can I use an external 24V power supply? How would I route the additional wires? https://www.amazon.com/dp/B07FT2RCG9/ref=tsm_1_tp_tc : r/Nest 2-Wire heat only furnace for Nest E. The Nest is having problems staying powered. Can I use an external 24V power supply? How would I route the additional wires? https://www.amazon.com/dp/B07FT2RCG9/ref=tsm_1_tp_tc : r/Nest](https://i.redd.it/sh6zbm6409h61.jpg)
2-Wire heat only furnace for Nest E. The Nest is having problems staying powered. Can I use an external 24V power supply? How would I route the additional wires? https://www.amazon.com/dp/B07FT2RCG9/ref=tsm_1_tp_tc : r/Nest
![Recently installed Amazon smart thermostat only has the option for heat. Are my wires connected correctly? : r/hvacadvice Recently installed Amazon smart thermostat only has the option for heat. Are my wires connected correctly? : r/hvacadvice](https://preview.redd.it/recently-installed-amazon-smart-thermostat-only-has-the-v0-4e0pvhrb1v4a1.jpg?width=640&crop=smart&auto=webp&s=036df08fc27731e4476ec66264bdc9a85ad4f6a4)