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Multi story home, issues with proper cooling

RustyS53
Community Member

‎05-29-2025 06:46 PM

Have a multi story townhome, have a sensor in the main bedroom, main level. sensor in the basement. Gen 4 thermostat on main level and Gen 3 thermostat upper level.

The home has a smart vent system that came with the home to help direct airflow and equalize temps in the house. Even with the systems installed, the upstairs will NOT stay cool and the basement is always freezing.

have closed vents to basement, and even some main level rooms, and the basement does have return vents.
house sits as follows. 75*-78* upstairs 68*-71* main level and nothing above 65* basement. I am suspecting that the smart vent system is wired or setup in correctly, but before I place full blame here, what is the most proper way to set the setting between all to where the fan can pull air from the basment and send it to the upstairs.

Its quite unbelievable how hot the upstairs gets

Heating is similar but not as bad, basement just gets colder, so with this info I would want it to operate opposite

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sicsacol
Community Specialist
Community Specialist

‎06-01-2025 03:20 PM

Hi @RustyS53,

 

Thanks for posting in the community. I'm sorry to hear you have a Nest Learning Thermostat (3rd Gen) and a Nest Learning Thermostat (4th Gen) in different parts of your house that aren't working as expected with cooling and heating, as the upstairs is always getting hot and the basement is always freezing. No worries, let's work together to figure out the issue you're experiencing. To help with that, I have a few questions for you:

  • Could you please share a picture of the previous and current wiring information for both Nest Learning Thermostats?
  • Can you please share a picture of the wiring installation on the HVAC system's control board?
  • Do you have a conventional HVAC system (furnace and AC) or a heat pump system (single unit for both heating and cooling)?
  • Does the issue happen with heating only, cooling only, or both for both Nest Learning Thermostats?
  • Are there any error messages on your Nest Learning Thermostat displays when the heating or cooling is turned on? If so, what exactly are they?

Please feel free to share any relevant information that might help.

 

Regards,
Jonathan

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