![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?auto=webp&s=c12cf7aca8a95fc19c8885ef239adc71f64413c5)
Recently installed Amazon smart thermostat only has the option for heat. Are my wires connected correctly? : r/hvacadvice
![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
![wiring - How to figure out how to wire a 2 wire furnace to 3 wire thermostat - Home Improvement Stack Exchange wiring - How to figure out how to wire a 2 wire furnace to 3 wire thermostat - Home Improvement Stack Exchange](https://i.stack.imgur.com/2GD2h.jpg)
wiring - How to figure out how to wire a 2 wire furnace to 3 wire thermostat - Home Improvement Stack Exchange
![Honeywell THX9421R5021WW 2 Wire IAQ High Definition Touch Screen Thermostat with Red LINK Technology, White: Amazon.com: Tools & Home Improvement Honeywell THX9421R5021WW 2 Wire IAQ High Definition Touch Screen Thermostat with Red LINK Technology, White: Amazon.com: Tools & Home Improvement](https://m.media-amazon.com/images/I/813I0lOuzIL._AC_UF894,1000_QL80_.jpg)
Honeywell THX9421R5021WW 2 Wire IAQ High Definition Touch Screen Thermostat with Red LINK Technology, White: Amazon.com: Tools & Home Improvement
![heating - Wifi thermostat to replace old mechanical 2-wire 110V Honeywell? - Home Improvement Stack Exchange heating - Wifi thermostat to replace old mechanical 2-wire 110V Honeywell? - Home Improvement Stack Exchange](https://i.stack.imgur.com/YnlT0.jpg)