The answer to 'ductwork not turning on' is that there are several common causes, including a tripped circuit breaker, a failed thermostat, or a problem with the blower motor or fan. The symptoms may include no air flow, the system not responding to the thermostat, or strange noises coming from the ductwork.
For simple issues like a tripped circuit breaker, you may be able to reset it yourself. However, for more complex problems with the thermostat, blower motor, or other components, it's best to call in a professional HVAC technician. They have the expertise to diagnose and repair the issue properly, ensuring your system is working safely and efficiently.