![electrical - Old oil furnace with 2 wire thermostat, installing new wifi and need C wire. How can I wire with my current stack switch? - Home Improvement Stack Exchange electrical - Old oil furnace with 2 wire thermostat, installing new wifi and need C wire. How can I wire with my current stack switch? - Home Improvement Stack Exchange](https://i.stack.imgur.com/Hq7vG.jpg)
electrical - Old oil furnace with 2 wire thermostat, installing new wifi and need C wire. How can I wire with my current stack switch? - Home Improvement Stack Exchange
![2 to 8 Wire All Thermostats Wiring Diagrams (Honeywell, Nest) | Thermostat wiring, Thermostat, Electrical diagram 2 to 8 Wire All Thermostats Wiring Diagrams (Honeywell, Nest) | Thermostat wiring, Thermostat, Electrical diagram](https://i.pinimg.com/736x/45/2d/cd/452dcd199d840f3929b6b52f03c0481b.jpg)
2 to 8 Wire All Thermostats Wiring Diagrams (Honeywell, Nest) | Thermostat wiring, Thermostat, Electrical diagram
![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
![Looking to replace a 2 wire heat only thermostat. Any recommendations for a programmable or smart thermostat? : r/hvacadvice Looking to replace a 2 wire heat only thermostat. Any recommendations for a programmable or smart thermostat? : r/hvacadvice](https://external-preview.redd.it/looking-to-replace-a-2-wire-heat-only-thermostat-any-v0-mpWoo4mgLoBKuJUcY96g2Rkk19n0en27ZGGofe-C5iw.jpg?auto=webp&s=1d948c6d24ef5db1ade6c23fd722766cc7df4584)