There are a few potential causes of short cycling:nn1. The thermostat could be set too low, causing the furnace to cycle on and off more frequently than necessary.nn2. There could be a problem with the furnace itself, such as a dirty filter or a faulty component.nn3. The ductwork could be blocked or restricted, preventing proper airflow.nn4. The home could be leaky, allowing heat to escape and causing the furnace to cycle more frequently in order to maintain the desired temperature.