Thanks for posting ― let's get this sorted out.
A few questions: what Nest Thermostat do you have? Check this link to know what thermostat you have. Since when has this been happening? Also, what troubleshooting steps have you done so far?
Thanks for assisting, Mel.
@quailman1948, I wanted to follow up and see if you are still in need of any help. 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.