Performed heat pump tune up. Checked all electrical connections and components. Tested electric heat kit. Checked supply and return temp in both heating modes. Checked blower capacitor. Cleaned electrostatic filter. Checked refrigerant pressures and temperatures. Outlet 120 ambient 37. Checked outdoor capacitor. Found vinyl discharge line ran outside with humidifier. Recommend rerouting into septic line. System running fine at time of service.