The answer to 'why is my ductwork not cooling' is that there could be several common causes, including leaks in the ductwork, a problem with the HVAC system, or insufficient airflow. Symptoms may include uneven cooling, warm air coming from the vents, or high energy bills.
Some potential solutions include sealing any leaks in the ductwork, cleaning or replacing the air filter, and ensuring the HVAC system is properly maintained and functioning. In some cases, you may need to call in a professional HVAC technician to diagnose and repair more complex issues with the ductwork or HVAC system.