![Wiring New Honeywell RTH6580WF Thermostat with no Yellow Wire at Thermostat - Home Improvement Stack Exchange Wiring New Honeywell RTH6580WF Thermostat with no Yellow Wire at Thermostat - Home Improvement Stack Exchange](https://i.stack.imgur.com/JTyJM.jpg)
Wiring New Honeywell RTH6580WF Thermostat with no Yellow Wire at Thermostat - Home Improvement Stack Exchange
![Honeywell Thermostat Wiring Instructions | Thermostat wiring, Wireless thermostat, Refrigeration and air conditioning Honeywell Thermostat Wiring Instructions | Thermostat wiring, Wireless thermostat, Refrigeration and air conditioning](https://i.pinimg.com/736x/0f/b1/f5/0fb1f57c0b2abf0aba1f8f73180cda5a.jpg)
Honeywell Thermostat Wiring Instructions | Thermostat wiring, Wireless thermostat, Refrigeration and air conditioning
![Am I compatible? There is also an addition yellow wire hidden in the back. Can't find anything referencing 1-4 like this. : r/ecobee Am I compatible? There is also an addition yellow wire hidden in the back. Can't find anything referencing 1-4 like this. : r/ecobee](https://i.redd.it/el03n2cye8k81.jpg)
Am I compatible? There is also an addition yellow wire hidden in the back. Can't find anything referencing 1-4 like this. : r/ecobee
![Honeywell Home CT410B Manual 4 Wire Premium Baseboard/Line Volt Thermostat CT410B1017 (Renewed) - Amazon.com Honeywell Home CT410B Manual 4 Wire Premium Baseboard/Line Volt Thermostat CT410B1017 (Renewed) - Amazon.com](https://m.media-amazon.com/images/I/714xd1uEUaL.jpg)