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Re:These states are basically begging you to get a heat pump by david422 on Friday February 09, 2024 @03:56PM (#39320447)
> the upper floor thermo controlled the lower damper and vice versa

I have 2 floors with multiple units and I was running around with a wall thermometer taking measurements. This was actually my guess as well since the temperatures seemed to align this way. But the installer assured me it was wired correctly .... I might need to find someone else to check things.

Re:These states are basically begging you to get a heat pump by theogravity on Friday February 09, 2024 @07:34PM (#39322245)
My system is a Trane with a 1050xl thermostat and a companion thermostat. If you have one of those (or a related thermostat model), you can get into the service menu by going to "service" and holding down the tech access button for a period of time. There should be a damper check option in the menu which will allow you to trigger specific dampers and there are some other buttons that show you which dampers are hooked to what thermostat.