The answer to 'zone control system high energy bills' is that there are several common causes, including improper zoning configuration, malfunctioning dampers or thermostats, and issues with the HVAC system itself. Symptoms may include uneven temperatures, high utility bills, and difficulty maintaining comfort levels in different zones of the home.
In many cases, the solution can be as simple as recalibrating the zoning system, replacing faulty components, or optimizing the HVAC system's settings. However, more complex issues may require the expertise of a professional HVAC technician to diagnose and resolve. It's generally recommended to call a professional if you're unsure of the root cause or feel the problem is beyond your DIY capabilities.