How do you operate 2006 Hyundai Tucson heater?

To operate the heater in a 2006 Hyundai Tucson, first start the engine and allow it to warm up. Then, adjust the temperature control dial to your desired warmth, typically marked with red for heat and blue for cold. Use the fan speed control to increase or decrease airflow, and select the appropriate vent setting (face, feet, or defrost) using the mode selector. Ensure that the air conditioning is off for maximum heating efficiency.