The answer to 'ductwork not turning on' is that there could be several common causes, such as a tripped circuit breaker, a faulty thermostat, or a problem with the blower motor. Symptoms may include no airflow from the vents, the system not responding to the thermostat, or strange noises coming from the ductwork.
In some cases, the issue may be a simple fix that a homeowner can do, like resetting a circuit breaker or checking the thermostat batteries. However, more complex problems like a failed blower motor or issues with the ductwork itself may require the expertise of a professional HVAC technician.