Hello lippy1,
Oh! It sounds like you're experiencing an inconvenience with your Nest Thermostat, causing your air conditioning to turn on unexpectedly while the heat is running. I'd be happy to take a look at this for you.
One potential solution to this is to check the settings and configurations of your Nest Thermostat. Ensure that the heating and cooling settings are properly configured and that there are no conflicting schedules or programming causing this issue. You may want to check for any wiring reports or message codes appearing in its settings. Also, a power-related issue could be the main reason for both of your systems to turn on randomly.
Could you gather its power readouts in the Technical Info settings or in the Equipment settings? Which Nest Thermostat do you have? Also, from what country are you posting?
I'll look forward to your response.
Best regards,
Mark
