![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
![Venstar ACC0436 2-Wire Kit for all 24VAC Thermostats - Programmable Household Thermostats - Amazon.com Venstar ACC0436 2-Wire Kit for all 24VAC Thermostats - Programmable Household Thermostats - Amazon.com](https://m.media-amazon.com/images/I/71vpsRkUvgL.jpg)
Venstar ACC0436 2-Wire Kit for all 24VAC Thermostats - Programmable Household Thermostats - Amazon.com
![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/rwc.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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heating - Wifi thermostat to replace old mechanical 2-wire 110V Honeywell? - 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
![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?
![Honeywell RLV4305A 5-2 Day Programmable TRIAC Line Volt Thermostat, thermostat, programmable thermostat | Honeywell Store Honeywell RLV4305A 5-2 Day Programmable TRIAC Line Volt Thermostat, thermostat, programmable thermostat | Honeywell Store](https://www.honeywellstore.com/store/images/products/large_images/rlv4305a1000-5-2-day-programmable-triac-line-volt-thermostat-from-honeywell-4.jpg)