Update on this, even more confused. I dismantled the portable AC because it does not heat, and we have gone from very hot to very cold. The HVAC for the floor and my unit are still displaying the same error and are apparently off. I can't detect any airflow from the diffusers nor across the doorway. Even with the windows closed, The CO2 concentration has stayed remarkably low, not getting above 650 ppm all night. The hallway CO2 was much higher last night ~900 ppm. How is this possible? I know the windows aren't super well insulated, but could the fresh air dampers not have closed when the system shut down?
#HVAC #IndoorAirQuality #IAQ #Askfedi