The answer to 'how much to fix zone control system' can vary significantly depending on the specific issues with your system, the age and complexity of the equipment, and your location. In general, the cost to repair a zone control system can range anywhere from a few hundred dollars to several thousand dollars.
Some of the key factors that influence the cost include the number of zones in your home, the type of zone control system (electronic vs. pneumatic), the extent of the repairs needed (e.g. replacing a thermostat vs. reconfiguring the entire system), and the labor rates in your local area. Additionally, if your system is older or requires more specialized parts, the costs can be higher.