The answer to 'ductwork short cycling' is that short cycling is when the HVAC system turns on and off rapidly, cycling more frequently than normal. This can be caused by issues with the thermostat, air filter, refrigerant levels, or other problems. Short cycling wastes energy, puts extra strain on the system, and can lead to more breakdowns over time.
Some common causes of short cycling include a dirty air filter restricting airflow, a thermostat that is not calibrated properly, low refrigerant levels, or a problem with the compressor or other HVAC components. Symptoms can include the system turning on and off every few minutes, uneven temperatures in the home, and higher energy bills.