![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?
![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
![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
![Honeywell Home Wi-Fi 7-Day Programmable Smart Thermostat with Digital Backlit Display RTH6580WF - The Home Depot Honeywell Home Wi-Fi 7-Day Programmable Smart Thermostat with Digital Backlit Display RTH6580WF - The Home Depot](https://images.thdstatic.com/productImages/c3aa5932-c698-443e-8728-2774cc35ce41/svn/white-honeywell-home-programmable-thermostats-rth6580wf-64_1000.jpg)
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?
![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
![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.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)
heating - Wifi thermostat to replace old mechanical 2-wire 110V Honeywell? - Home Improvement Stack Exchange
![Is your wiring compatible with a smart thermostat? Our guide to low voltage, line voltage, and more – Smart Thermostat Guide Is your wiring compatible with a smart thermostat? Our guide to low voltage, line voltage, and more – Smart Thermostat Guide](https://smartthermostatguide.com/wp-content/uploads/2016/02/thermostat_wires_no_c_wire.jpg)
Is your wiring compatible with a smart thermostat? Our guide to low voltage, line voltage, and more – Smart Thermostat Guide
![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)