The answer to 'how much to fix zone control system in my area' is that the cost can vary widely depending on several factors. Typical ranges for repairing a zone control system can be anywhere from a few hundred dollars to over a thousand, depending on the extent of the repairs needed.
Some key factors that influence the cost include the age and complexity of the zone control system, the number of zones that need to be serviced, any necessary parts or equipment replacements, and the labor rates in your local area. It's always best to get quotes from multiple HVAC contractors in your local area to get a better sense of the typical pricing.