2-zone system with A/C
We have a 2-zone system (Carrier Weathermaker) and it works fine with our heater. We just installed an A/C unit and it seems that with that, there is no zoning and all registers blow out almost the same amount of air, regardless of which zone they're in. Why is that? All the control wires are installed properly. Is that because of Leaving Air Temperature (LAT) sensor?