| SONATA(YF) >2012 > G 2.4 GDI > Heating,Ventilation, Air Conditioning > Controller > Heater & A/C Control Unit(Dual)>Repair procedures |

Self Diagnosis

Fail safe

1. | In-car temperature sensor: Control with the value of 25°C(77°F)

2. | Ambient temperature sensor: Control with the value of 20°C(67°F)

3. | Evaporator temperature sensor: Control with the value of -2°C(28.4°F)

4. | Water temperature sensor: Control with the value of 85°C(185°F)

5. | Temperature control actuator (Air mix potentiometer): If temperature setting 17°C-24.5°C, fix at maximum cooling position. If temperature setting 25°C-32°C, fix at maximum heating position.

6. | Mode control actuator (Direction potentiometer): Fix vent position, while selecting vent mode. Fix defrost position, while selecting all except vent mode.

7. | Intake control actuator : Fix fresh position, while selecting fresh mode. Fix recirculation position, while selecting recirculation mode.

Replacement

1. | Remove the crash pad garnish (A).

2. | Using the screwdriver, remove the center facia panel (A).

3. | Disconnect the connectors (A) and then remove the center facia panel from the crash pad.

4. | Remove the heater and A/C controller (A) from the center facia.

5. | Installation is the reverse order of removal.