Wiring for Nest

[Guytang]

I just purchased a google nest thermostat and configured based on what the instructions said. My current thermostat works, but my nest doesn’t. I set my nest back to factory reset but still can’t get the furnace to blow warm air. I have attached a picture of my old thermostat configuration and what I thought this was my nest configuration, can also wine please tell me what I am doing wrong?  One more piece of information, I did change the blue wire from OB to C and that still didn’t work.  

Pic 1: Nest Configuration

Pic 2: old thermastat 

Pic 3: furnace wiring

 furnace

[Houptee]

Blue wire is your C wire. Some brands call C the B on the furnace (make sure the blue wire is on the B or C screw in the furnace).

Then you need to start over and tell Nest it is a Heat and AC system with forced air (Not a heat pump, it probably thought you had a heat pump when it saw the wire attached to the OB* and set it up wrong).

[Guytang]

Thank you very much. I was finally able to get it configured properly. 

[EdwardT]

Hi folks,

@Houptee, thanks for the help!

@Guytang, thanks for the update. I'm glad to hear that you were able to set it up. I will be locking this thread in 24 hours. Please feel free to create a new thread should you have some more questions or concerns in the near future and we'll be more than glad to help.

Thanks,

Edward