2008 Hyundai Sonata Owner's Manual - Page 123

FEATURES OF YOUR HYUNDAI 1 109 B970C01NF-AAT 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 "OFF" and "AUTO " button simultaneously for 3 seconds. The display shows that the unit of temperature is adjusted to Centigrade or Fahrenheit (°C → °F or °F → °C). HNF2137 HNF2135 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. And, the air conditioning will operate if ambient temperature is higher than 34.7°F(1.5°C) and automatically turns off if the ambient temperature drops below 33.08°F(0.6°C). 2. Turn the "TEMP" knob to set the desired temperature. The temperature will increase to the maximum "HI" by turning the knob clockwise. The temperature will decrease to the minimum "LO" by turning the knob counterclockwise.