The answer to 'why is my ductwork not cooling' is that there are several common causes, including leaks in the ductwork, blockages, or issues with the HVAC system itself. Symptoms may include uneven cooling, higher energy bills, and warm air coming from the vents.
Some potential solutions include sealing any leaks in the ductwork, clearing any blockages or debris, and ensuring the HVAC system is properly maintained and functioning. However, more complex issues may require the expertise of a professional HVAC technician.