Can G wires be added if you don't have one?

[SBS]

My home came with a Nest Thermostat already installed. For the first time since moving in, I wanted to turn just the fan on and am not able, as it doesn't show the fan option on the thermostat. My google search said that I must have a G wire to run the fan without Heat/AC. When I took the face off the thermostat, there was no G wire connected.  Is this something that can be added if you don't appear to have one?

[Patrick_Caezza]

@SBS 

If you want to run the fan manually, a G wire must be installed.

Post a picture of the thermostat wiring.

[Jenelyn_O]

Hi there,

@Patrick_Caezza, I appreciate your input.

@SBS, thanks for reaching out. I hope you get the answer you're looking for. Please let us know if you still have questions in mind to further assist you.

Best,

Jenelyn

[EmersonB]

Hi everyone,

@SBS, we wanted to follow up and see if you are still in need of any help. Please let us know if you are still having any concerns or questions from here, as we would be happy to take a closer look and assist you further.

I appreciate the help, Patrick_Caezza and Jenelyn.

Regards,
Emerson

[EmersonB]

Hey SBS,

Just one quick final check in here since activity has slowed down. We'll be locking the thread in the next 24 hours, but if you still need help, we would be happy to keep it open. If there's more we can do, just let us know.

Thanks,
Emerson

[SBS]

Thank you. The thermostat doesn’t have a G-wire attached but I am have spoken to a specialist about the possibility of update the wiring to support using the fan without ac or heat and believe I have a solution. I appreciate the responses and support. 

[Jenelyn_O]

Hello there,

Thanks for keeping us in the loop. I'm glad that our team is taking care of it. Please feel free to create a new thread if you have any questions or concerns, as we'll be willing to assist you from there. Otherwise, I'll be locking this thread after 24 hours.

I appreciate your help, Emerson.

Cheers,

Jenelyn