2004 Hyundai Sonata Owner's Manual - Page 85

FEATURES OF YOUR HYUNDAI B970C03L-AAT 1- 73 Automatic Operation NOTE: If the battery has been discharged or disconnected, the temperature mode will reset to Centigrade degrees. This is a normal condition and you can change the temperature mode from Centigrade to Fahrenheit as follows; Press the TEMP down ( ) button 3 seconds or more with the AMB button held down. The display shows that the unit of temperature is adjusted to Centigrade or Fahrenheit (°C → °F or °F → °C). HEF-033 HEF-040 The FATC (Full Automatic Temperature Control) system automatically controls heating and cooling as follows: 1. Push the "AUTO" switch. The indicator light will illuminate confirming that the Face, Floor and/or Bi-Level modes as well as the blower speed and, air conditioner will be controlled automatically. 2. Push the "TEMP" button to set the desired temperature. The temperature will increase to the maximum 90°F(32°C) by pushing on the button. Each push of the button will cause the temperature to increase by 1°F(0.5°C). The temperature will decrease to the minimum 62°F(17°C) by pushing on the button. Each push of the button will cause the temperature to decrease by 1°F(0.5°C). Photo Sensor HEF-237 NOTE: Never place anything over the sensor which is located on the instrument panel to ensure better control of the heating and cooling system.