The answer to 'zone control system not cooling' is that there can be several common causes, including issues with the thermostat, dampers, or the HVAC system itself. Symptoms may include uneven temperatures, some rooms not cooling properly, and the system running constantly without reaching the set temperature. Solutions can range from adjusting the thermostat settings to repairing or replacing faulty components in the zone control system.
If the issue is with the thermostat, you may be able to troubleshoot and make adjustments yourself. However, if the problem lies with the dampers, air ducts, or the HVAC equipment, it's best to call in a professional HVAC technician to diagnose and repair the issue. Attempting complex repairs on your own could lead to further damage or safety concerns.