The answer to 'zone control system not heating' is that there can be several common causes, including issues with the thermostat, dampers, or the zone control panel itself. Symptoms may include uneven heating, certain zones not heating properly, or the system not responding to the thermostat.
Some potential solutions include checking the thermostat settings, ensuring the dampers are opening and closing properly, and inspecting the zone control panel for any error codes or malfunctions. However, diagnosing and repairing a zone control system often requires the expertise of a professional HVAC technician, especially if the issue is with the control panel or other complex components.