The answer to 'ductwork not working' is that there could be several common causes, including air leaks, blockages, or issues with the blower fan. Symptoms may include uneven temperatures, strange noises, or reduced airflow from vents.
Some potential solutions include sealing any ductwork leaks, clearing any obstructions, and checking the blower fan to ensure it's functioning properly. However, more complex issues may require the expertise of a professional HVAC technician.