![What's involved in replacing this old thermostat with a more modern programmable one? Yes, I know it's a mercury switch, and to dispose of properly. : r/HomeMaintenance What's involved in replacing this old thermostat with a more modern programmable one? Yes, I know it's a mercury switch, and to dispose of properly. : r/HomeMaintenance](https://preview.redd.it/whats-involved-in-replacing-this-old-thermostat-with-a-more-v0-r7xr7ttahy5a1.jpg?auto=webp&s=7f808bfa5a03e5f8eb2f373ef519ec4435aacfed)
What's involved in replacing this old thermostat with a more modern programmable one? Yes, I know it's a mercury switch, and to dispose of properly. : r/HomeMaintenance
![1,600+ Old Thermostat Stock Photos, Pictures & Royalty-Free Images - iStock | Smart thermostat, Vintage thermostat, Ugly thermostat 1,600+ Old Thermostat Stock Photos, Pictures & Royalty-Free Images - iStock | Smart thermostat, Vintage thermostat, Ugly thermostat](https://media.istockphoto.com/id/911159016/photo/thermostat.jpg?s=612x612&w=0&k=20&c=-IBXOaNHr-8IsQLnjLN_2-5owaFQ6AT7Z1YSF4AvmP4=)
1,600+ Old Thermostat Stock Photos, Pictures & Royalty-Free Images - iStock | Smart thermostat, Vintage thermostat, Ugly thermostat
![1940 - 1950 s Vintage Art Deco Style Thermostat | Early Programmable Thermostat | Early Clock Thermostat | First Clock Thermostat | Antique Delco Thermostat 1940 - 1950 s Vintage Art Deco Style Thermostat | Early Programmable Thermostat | Early Clock Thermostat | First Clock Thermostat | Antique Delco Thermostat](https://www.perri-aire.com/museum/Mvc-013f.jpg)
1940 - 1950 s Vintage Art Deco Style Thermostat | Early Programmable Thermostat | Early Clock Thermostat | First Clock Thermostat | Antique Delco Thermostat
I am replacing an old Honeywell thermostat heat only. The wires are not labeled and no label on the terminal. What would the brass terminal wire color be and what color would
![Line Voltage Thermostat Cover Bundle, White Double Pole Thermostat Wall Plate and Knob for Old Style D22 with Charisity Thermometer/Hygrometer for More Accurate Temperature and Humidity Monitoring - Amazon.com Line Voltage Thermostat Cover Bundle, White Double Pole Thermostat Wall Plate and Knob for Old Style D22 with Charisity Thermometer/Hygrometer for More Accurate Temperature and Humidity Monitoring - Amazon.com](https://m.media-amazon.com/images/I/31VhMuZ5QVL._AC_.jpg)