The answer to 'zone control system short cycling' is that short cycling, where the HVAC system turns on and off rapidly, is a common issue with zone control systems. This is usually caused by problems with the zone dampers, thermostats, or the control system itself. Symptoms include uneven temperatures, high energy bills, and the system never reaching the desired temperature before cycling off.
Some common causes are incorrect zone damper settings, faulty thermostats, a system that is oversized for the home, or issues with the control board or wiring. Homeowners can try checking the dampers, replacing batteries in thermostats, and ensuring the system is properly sized, but if the issue persists, it's best to call in an HVAC professional to diagnose and repair the problem.