How To Fix A Missing C Wire | Nest Thermostat Troubleshooting

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It is common when a DIYer goes to install a smart thermostat like a Nest that you might be missing a C wire or even the C and G wire like in my case. I will show you how to get new wire (C wire) from your furnace control board to your thermostat location to ensure your nest or other smart thermostat works properly.
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