topic Re: Nest 4th gen hot air no matter heat or cool. No matter O/B settings in Home Automation

Nest 4th gen hot air no matter heat or cool. No matter O/B settings

xh2106 — Sat, 08 Mar 2025 22:47:54 GMT

My thermostats is set to cool heat code 70/76.
it’s been working fine in winter. Today it got hot. And it started to “cool except it was still hot air”

I have it it set on O and seasonal. Tried O and each cycle and tried B each cycle as well. Didn’t work no matter what.

please help

Re: Nest 4th gen hot air no matter heat or cool. No matter O/B settings

EduardoN — Tue, 11 Mar 2025 21:12:13 GMT

Hi @xh2106,

Thank you for reaching out to our support community! I sincerely apologize for the inconvenience caused by the heating turning on when you request cooling, and I appreciate you taking the time to troubleshoot your Nest Thermostat.

Based on this information, I'd like to ask you more about this concern. I'm here to assist you further!

When did the issue first occur?
What type of furnace do you have? (gas, electric, etc.)
Which wires do you have?
Do you see any error code in your thermostat?

Visit our Help Center to learn more about Troubleshoot strange heating or cooling behavior.

Please feel free to share any additional details you think might be relevant.

Best regards,

Eduardo

Re: Nest 4th gen hot air no matter heat or cool. No matter O/B settings

xh2106 — Tue, 11 Mar 2025 23:30:35 GMT

Electric from 2007

I have Y G C O/B and R wires.
I had a licensed AC tech install 6 of these 4th gen thermostats.

original

older thermostat had S1 L C R Y O/B G G2 wires.
I can attach photos but I don’t see how to here

Re: Nest 4th gen hot air no matter heat or cool. No matter O/B settings

xh2106 — Tue, 11 Mar 2025 23:31:04 GMT

No error codes

Re: Nest 4th gen hot air no matter heat or cool. No matter O/B settings

EduardoN — Tue, 11 Mar 2025 23:58:27 GMT

Hi @xh2106,

I appreciate all the information you shared. I've now confirmed the issue, but we still need to check the wiring and continue troubleshooting.

The team would like to know more about this behavior. When you get a chance, please fill out this form. Remember to include the link to this post. Let me know when you’re finished. From there, we'll contact you via email.

Your confirmation is crucial to ensuring that I can follow up on your case effectively.

Feel free to keep us posted.

Regards,

Eduardo