Compatability or wiring issue?

[CDalton]

 I asked this question in another thread withought realizing it was inappropriate conduct in this forum. My bad. I'm trying to determine if I have a compatibility issue or if the wiring is incorrect and hoping someone has a helpful solution. 

Installed the nest thermostat and it would only blow cold air. Set up twice with a factory reset in between using blue wire in B and then in C. Both had same result. I'd love some constructive suggestions before I give the thermostat away. The Pic below is the old thermostat. TIA.  

 

[Patrick_Caezza]

Look to see how the blue wire is terminated at the terminal block on the control board in the furnace/air handler. Does it go to a C terminal or something else?

I almost want to say it goes to something else, but I can't say for sure.

If it goes to the C terminal, give this a try.

Red - R to R (jumper to Rc not needed)

Blue - B to C

Green - G to G

Yellow - Y to Y

White - W to W

When asked which wires are you using, select these.

R, C, G/G1, Y/Y1, and W/W1

If it goes to something else, give this a try.

Red - R to R

Blue - B to */OB

Green - G to G

Yellow - Y to Y

White - W to W

When asked which wires are you using, select these.

R, B, G/G1, Y/Y1, and W/W1

Be sure to do a factory reset.

[MelbaDT]

Hey folks, 

Thanks again for your detailed response, Patrick_Caezza. 

CDalton, I'm jumping in here to check if everything is good now with your Nest thermostat. Have you tried Patrick's suggestion above already?

Best, 

Melba

[MelbaDT]

Hey CDalton, 

Checking back in ― still need help here?

Best, 

Melba

[MelbaDT]

Hi, 

I haven't heard from you in a while so I'll be locking this thread if there is no update within the day. If you have any new issues, updates or just a discussion topic, feel free to start a new thread in the community.

Best, 

Melba