The answer to 'how to maintain zone control system' is to regularly inspect, clean, and calibrate the components of your zone control system. This includes the thermostats, dampers, and control panel.
Start by checking the thermostat settings in each zone to ensure they are accurate and functioning properly. Clean the thermostat sensors and screens to maintain optimal performance. Next, inspect the dampers to make sure they are opening and closing fully without any obstructions. Check the control panel for any error codes or issues, and recalibrate the system if necessary.