New Thermostat heater wont turn on

[AnthoniSi]

I recently installed the nest thermostat and AC works fine, but they heat does not work. I have a picture of the old setup and the new. Can someone help determine if the wiring is correct?

[AnthoniSi]

[Jake]

Hey AnthoniSi,

Sorry for the late reply. I wanted to follow up and ensure you are good to go. 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

[gregallanfl]

OldNew Google Nest InstallI have a new installation and the natural gas heat will not come on, just the blower.  AC works fine.  When I put the old thermostat back in, it works great.  Pics of old and new wiring are attached.  Details: New Google Nest G4CVZ GA01334-US.  Bryant Gas Furnace Model 313   Please advise ASAP, I need heat! 

[Jake]

Hey gregallanfl,

I am sorry to hear you are having trouble, I would be happy to help out. Taking a closer look at the picture provided, I am showing that you have a couple stranded wires. Do you happen to know what the orange and brown wire control on your system?

Nest Thermostats are not compatible with stranded wiring, and I would recommend having a Nest Pro come out and take a closer look. They would be able to install the device and ensure everything is working properly. Please let me know if you have any questions from here.

Best regards,

Jake

[gregallanfl]

When I looked at the google home app. Settings -> thermostat -> wiring  wiring the OB * wiring diagram showed that it was connected and thought I had a heat pump!  I don't have a heat pump and asked the wiring to disconnect it.  I now have heat for the winter in Florida!  Thank you!  

[Jake]

Hey gregallanfl,

Glad to hear you were able to get the heat working! With the issue being resolved, I am going to lock the thread at this time. If you run into any troubles from here, please feel free to create a new post. Have a wonderful rest of your day.

Best regards,

Jake