The answer to 'how to maintain zone control system' is to regularly inspect and service the components of your zone control system to ensure it continues to function properly. This includes checking the thermostat, dampers, and control panel, as well as cleaning the air filters and vents.
It's recommended to have a professional HVAC technician service your zone control system at least once a year, typically during the fall before the heating season begins. They can perform a full inspection, make any necessary adjustments or repairs, and ensure the system is ready for the winter months. Between professional service visits, you can do some basic maintenance tasks yourself, such as cleaning the air filters and wiping down the thermostat and control panel.