The answer to 'ductwork not heating' is that there are several common causes, including blocked or damaged ductwork, issues with the HVAC system, and problems with the thermostat. Symptoms may include uneven heating, cold spots, or the system not turning on at all. Solutions can range from simple DIY fixes to more complex professional repairs.
If the ductwork is blocked or damaged, you may be able to inspect and clean the ducts yourself. However, more serious ductwork issues like leaks or disconnections will likely require a professional HVAC technician to diagnose and repair. Problems with the HVAC system, such as a malfunctioning furnace or heat pump, will also need a professional assessment and repair. And issues with the thermostat, such as improper settings or a faulty unit, can sometimes be addressed through DIY troubleshooting, but may require replacement by a technician.