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C Wire for Nest

Discussion in 'Home Improvement' started by 19TurdPro, Jun 4, 2022.

  1. Jun 4, 2022 at 10:15 AM
    #1
    19TurdPro

    #1
    19TurdPro [OP] New Member

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    Any HVAC techs in the house?
    My Nest Gen 3 doesn't have a C wire, but I have an extra, unused wire in my thermostat. It's the blue wire. Can I make this a C wire somehow? See pics of my thermostat and furnace board.

    20220604_101103.jpg
    20220604_101156.jpg
     
    19TurdPro, Jun 4, 2022
    #1
  2. Jun 4, 2022 at 10:47 AM
    #2
    poheller

    #2
    poheller 2018 Platinum

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    Might try this

    F195AD17-26D6-41FE-B8F9-76E71D52A73F.jpg
     
    poheller, Jun 4, 2022
    #2
  3. Jun 4, 2022 at 11:09 AM
    #3
    19TurdPro

    #3
    19TurdPro [OP] New Member

    Joined:
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    That's one possible solution. I'm 99% sure I can utilize that unused blue wire. I want to confirm if it's as easy as connecting it to the C terminal on my furnace board, then to the C terminal on the Nest.
     
    19TurdPro, Jun 4, 2022
    #3
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