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C Wire on Motherboard

saakd84
Community Member

I am trying to install the nest and have a c wire that was not being used by the current thermostat. I wired the nest, and all wires were found except the c wire. 

I wired the blue wire c to c, on the thermostat and furnace in the c terminal, but it didn't work. I tried other terminals as well. Here is what the motherboard setup looks like. Where should I wire the blue wire on the furnace? Any help?

https://photos.app.goo.gl/3nyNRE2EcSRFWuJJ7

 

 

1 REPLY 1

zoeuvre
Community Specialist
Community Specialist

Hi saakd84, 

 

Thanks for reaching out, and I appreciate you trying to install the C wire from your furnace control board to the Nest Thermoistat base on your own. Are you located in North America or Europe? What type of Nest Thermostat do you have? Also, take note that when installing an additional wire from your furnace to the Nest Thermostat, it is highly recommended that you contact a pro to install it to check it manually and install it carefully.

 

Keep us posted.

 

Best,

Zoe