![Two 2 wire Honeywell digital thermostat to replace mercury switch. Convert from mercury switch - YouTube Two 2 wire Honeywell digital thermostat to replace mercury switch. Convert from mercury switch - YouTube](https://i.ytimg.com/vi/YqTUSs56E7A/maxresdefault.jpg)
Two 2 wire Honeywell digital thermostat to replace mercury switch. Convert from mercury switch - YouTube
![Amazon.com: Honeywell Home CT410B Manual 4 Wire Premium Baseboard/Line Volt Thermostat CT410B1017 : Everything Else Amazon.com: Honeywell Home CT410B Manual 4 Wire Premium Baseboard/Line Volt Thermostat CT410B1017 : Everything Else](https://m.media-amazon.com/images/I/71-g06v8xcL._AC_UF894,1000_QL80_.jpg)
Amazon.com: Honeywell Home CT410B Manual 4 Wire Premium Baseboard/Line Volt Thermostat CT410B1017 : Everything Else
![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?
![How Wire a White Rodgers Room Thermostat, White Rodgers Thermostat Wiring Connection Tables, Hook-up Procedures for new & old White Rodgers Heating, Heat Pump, or Air Conditioning Thermostats How Wire a White Rodgers Room Thermostat, White Rodgers Thermostat Wiring Connection Tables, Hook-up Procedures for new & old White Rodgers Heating, Heat Pump, or Air Conditioning Thermostats](https://inspectapedia.com/heat/WR_1F90_006f15_DJFc.jpg)
How Wire a White Rodgers Room Thermostat, White Rodgers Thermostat Wiring Connection Tables, Hook-up Procedures for new & old White Rodgers Heating, Heat Pump, or Air Conditioning Thermostats
![Installing new 2-wire (Single Pole) Thermostats - how to install when there are 3 wires in wall? - Home Improvement Stack Exchange Installing new 2-wire (Single Pole) Thermostats - how to install when there are 3 wires in wall? - Home Improvement Stack Exchange](https://i.stack.imgur.com/JmTci.jpg)