![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
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Honeywell Home Wi-Fi 7-Day Programmable Smart Thermostat with Digital Backlit Display RTH6580WF - The Home Depot
![My heat-only system only has two or three wires connected to the thermostat. Am I compatible with ecobee? My heat-only system only has two or three wires connected to the thermostat. Am I compatible with ecobee?](https://storage.googleapis.com/article_attachments/227874667/Untitled_Diagram__10_.png)
My heat-only system only has two or three wires connected to the thermostat. Am I compatible with ecobee?
![My heat-only system only has two or three wires connected to the thermostat. Am I compatible with ecobee? My heat-only system only has two or three wires connected to the thermostat. Am I compatible with ecobee?](https://storage.googleapis.com/article_attachments/227874667/gasvalvefaststat.png)
My heat-only system only has two or three wires connected to the thermostat. Am I compatible with ecobee?
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Recently installed Amazon smart thermostat only has the option for heat. Are my wires connected correctly? : r/hvacadvice
![Wiring a Honeywell Room Thermostat - Honeywell or Resideo Thermostat Wiring Connection Tables & Hook-up Procedures Wiring a Honeywell Room Thermostat - Honeywell or Resideo Thermostat Wiring Connection Tables & Hook-up Procedures](https://inspectapedia.com/heat/Honeywell-TH611-Wires.jpg)
Wiring a Honeywell Room Thermostat - Honeywell or Resideo Thermostat Wiring Connection Tables & Hook-up Procedures
![Amazon.com: Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat, 7 Day Programmable, Touch Screen, Energy Star, Alexa Ready, C-Wire Required, Not Compatible with Line Volt Heating Gray : Home & Kitchen Amazon.com: Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat, 7 Day Programmable, Touch Screen, Energy Star, Alexa Ready, C-Wire Required, Not Compatible with Line Volt Heating Gray : Home & Kitchen](https://m.media-amazon.com/images/I/81iSTdLWl4L.jpg)
Amazon.com: Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat, 7 Day Programmable, Touch Screen, Energy Star, Alexa Ready, C-Wire Required, Not Compatible with Line Volt Heating Gray : Home & Kitchen
![LuxPro Digital 2 Wire Heat Only Thermostat - PSD010B - Programmable Household Thermostats - Amazon.com LuxPro Digital 2 Wire Heat Only Thermostat - PSD010B - Programmable Household Thermostats - Amazon.com](https://m.media-amazon.com/images/I/516W9saq+4L._AC_UF894,1000_QL80_.jpg)
LuxPro Digital 2 Wire Heat Only Thermostat - PSD010B - Programmable Household Thermostats - Amazon.com
![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)
heating - Wifi thermostat to replace old mechanical 2-wire 110V Honeywell? - Home Improvement Stack Exchange
![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://preview.redd.it/sh6zbm6409h61.jpg?auto=webp&s=3620f2cb24653051517a60e200a76456b90dea7e)
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
![Google Nest Thermostat - Smart Thermostat for Home - Programmable Wifi Thermostat - Snow - Amazon.com Google Nest Thermostat - Smart Thermostat for Home - Programmable Wifi Thermostat - Snow - Amazon.com](https://m.media-amazon.com/images/I/71Iu3puyhaS._AC_UF350,350_QL80_.jpg)
Google Nest Thermostat - Smart Thermostat for Home - Programmable Wifi Thermostat - Snow - Amazon.com
![Amazon.com: Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat, 7 Day Programmable, Touch Screen, Energy Star, Alexa Ready, C-Wire Required, Not Compatible with Line Volt Heating Gray : Home & Kitchen Amazon.com: Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat, 7 Day Programmable, Touch Screen, Energy Star, Alexa Ready, C-Wire Required, Not Compatible with Line Volt Heating Gray : Home & Kitchen](https://m.media-amazon.com/images/I/81iSTdLWl4L._AC_UF894,1000_QL80_.jpg)