Hot air on cool mode

[AtomNest]

Hi 

my hvac is blowing hot air in cool mode.

my ob is connected with orange wire and setup as second stage heating. I don’t have second stage cooling.

tried it the ob as second stage heating or second stage cooling, both didn’t work 

thanks for your help 

[Carbon1204]

• Nest Learning Thermostat (4th gen) and the Cool option no longer displays

[Carbon1204]

Gen 4 and no to all the questions.  The power went out in my complex then came back on just the other day.

[Carbon1204]

I'm having the same issue with my Gen 4

[GabrielaG]

Hi everyone,

Thanks for reaching out to the community. I'm sorry to hear your Nest Thermostat is not working as expected and is blowing hot air instead of cool, but there's no need to worry; I'm happy to help you right now.

To get a better understanding of the situation, please help me out by answering the following questions:

• When did cooling last work?
• When was the last maintenance service and cleaning?
• Is this the first time you’re calling for cooling this year?
• Have you set up a temperature schedule for your thermostat?
• Did you check the O/B wire configuration and try changing the O-wire to the B-wire configuration or vice versa?
• Do you see a power error code on your thermostat?
• Can you please send me a picture of the Nest Thermostat wiring?

Any additional details you can provide will be helpful.

Best regards,

Gabriela