The answer to 'why is my ductwork not turning on' is that there could be several common causes, such as a problem with the thermostat, a tripped circuit breaker, or an issue with the ductwork itself. Some common symptoms include no airflow coming from the vents, the HVAC system not kicking on, or the thermostat not registering a temperature change.
If the ductwork is not turning on, first check the thermostat to ensure it is set to the 'on' position and that the temperature is set correctly. Next, inspect the circuit breakers or fuses that power the HVAC system and reset them if necessary. You should also visually inspect the ductwork for any obvious blockages or damage. If you cannot identify and resolve the issue, it's best to call in a professional HVAC technician to diagnose and repair the problem.