Before diving into specific issues, it's essential to have a basic understanding of how your HVAC system works. An HVAC system regulates the temperature, humidity, and air quality within your home. It consists of several components, including a furnace, air conditioner, ductwork, and thermostat. The Role of the Furnace The furnace is responsible for heating the air and distributing it throughout your home during colder months. It typically runs on natural gas, electricity, o