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Installing new 2-wire (Single Pole) Thermostats - how to install when there are 3 wires in wall? - Home Improvement Stack Exchange
![Bought a smart thermostat that needs a c wire. There is a red wire attached to the furnace in that spot but doesn't seem to come out of the wall where the Bought a smart thermostat that needs a c wire. There is a red wire attached to the furnace in that spot but doesn't seem to come out of the wall where the](https://preview.redd.it/e1tdkhmnp7281.jpg?width=640&crop=smart&auto=webp&s=76b00be2cb32fa4180a2b71c4bb8f574ad4f3db5)
Bought a smart thermostat that needs a c wire. There is a red wire attached to the furnace in that spot but doesn't seem to come out of the wall where the
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