Performed Heat tune up on a 2019 York Heatpump. Door room to air handler are blocking air flow, suggest closing door to improve airflow. Refrigerant level improve from 311/66 to 340/84 and temperature split improve from 20 to 29. Possible air flow and refrigerant issue, advise to get system check out during warmer temperature. Vacuumed blower compartment, filter is good, and cleared drain lines. Heat tune up complete.