The answer to 'zone control system not cooling' is that there are several common causes, including low refrigerant levels, faulty thermostat, blocked airflow, or issues with the zone dampers or control board. Symptoms may include uneven cooling, warm spots in the home, or the system running constantly without cooling properly.
To troubleshoot, first check the thermostat settings and ensure the zone dampers are opening and closing as expected. Inspect the air filters and vents for any blockages. If the issue persists, you may need to call an HVAC professional to diagnose and repair any refrigerant leaks, faulty components, or other underlying problems with the zone control system.