Why isn't the automatic pilot not igniting and gas not flowing?

[surfschool]

Hello Community,

I successfully installed two Nests in our old place - 4 wires and no problems.  We're in a different house now and the heater has worked very well and has a humidifier attached (no air conditioner).  This house has 3 wires (W, R, G) and I also purchased a C wire (Google version) which I attached at the source.  Everything appears to work great - I turn the Nest to heat and the system clicks to life, but I don't smell or hear any gas release nor do I hear the autopilot make an attempt to light any gas.  

It's just blowing cold air.  What am I doing wrong?

[Houptee]

We need to see the way you wired it at the furnace and at the Nest base.

[Houptee]

How did you attach the C common at the furnace? Was there a screw marked C on the furnace?

Can you pull a new 5 conductor thermostat cable from the furnace to the Nest?

That is always the best way to solve C wire problems is to actually have a real C wire not the adapter device.

[surfschool]

I've heard this as well - it will be challenging to pull a wire.  i have photos of the wiring at the furnace and Nest here:

[Jake]

Hey there,

Thanks for the help Houptee.

Sorry for the late reply. I wanted to follow up and see if I could be of any help. I found an article with some troubleshooting steps. Please let me know if you are still having any trouble from here, as I would be happy to take a closer look and assist you further. 

Best regards,
Jake

[Jake]

Hey there,

I wanted to check in and see if you are still in need of any help. Please let me know, as I would be happy to assist, and answer any questions you may have.

Best regards,
Jake

[Jake]

Hey there,

I wanted to check in, and let you know that I will be locking the thread in 24 hours.

Best regards,

Jake

[Houptee]

Are you sure that you have the correct wires on nest R and C the wires are so old cannot make out the colors of them. Maybe they are reversed?

[EdwardT]

Hi folks,

@Houptee, thanks for the help!

@surfschool, I'm just checking in to make sure that you've seen our response. Please let us know if you have any other questions or concerns as I will be locking this in 24 hours.

Thanks,

Edward