Hyundai Genesis DH Quiz
Heating, Ventilation, and Air Conditioning

Heater and A/C Control Unit Repair Procedures

In this manual: Heating, Ventilation, and Air Conditioning
General Information — 9Engine Mechanical System — 103Engine Electrical System — 54Emission Control System — 23Engine Control System/Fuel System — 127Automatic Transmission System (SBC) — 90All-Wheel Drive (AWD) System — 20Drive Shaft and Axle — 27Suspension System — 41Steering — 19Restraints — 56Brake System — 56Body (Interior and Exterior) — 211Body Electrical System — 279Heating, Ventilation, and Air Conditioning — 55
11steps
~66min
3/5difficulty
0102030405000N·mlb·ft
Tightening torque found on this page
Done 0 of 11

Self-Diagnosis

  1. Self-Diagnosis Procedure
  2. How to Read Self-Diagnosis Codes. After the display panel flashes three times at 0.5-second intervals, the corresponding trouble code flashes on the temperature setting display panel at 0.5-second intervals and shows two digits. Codes are displayed in numeric format. Trouble Code
    Trouble Code
    Control Unit    		 Fault Description
    0 Normal
    11 Interior Temperature Sensor Open Circuit
    12 Interior Temperature Sensor Short Circuit
    13 Ambient Temperature Sensor Open Circuit
    14 Ambient Temperature Sensor Short Circuit
    17 Evaporator Temperature Sensor Open Circuit
    18 Evaporator Temperature Sensor Short Circuit
    19 Temperature Door Potentiometer Open/Short Circuit (Driver Side)
    20 Temperature Door Potentiometer Motor (Driver Side)
    21 Mode Door Potentiometer Open/Short Circuit (Driver Side)
    22 Mode Door Potentiometer Motor
    23 Anti-Fog Sensor Open Circuit
    24 Anti-Fog Sensor Short Circuit
    25 Intake Door Potentiometer Open/Short Circuit
    26 Intake Door Potentiometer Motor
    27 AQS Sensor Open Circuit
    28 AQS Sensor Short Circuit
    31 AQS Sensor Malfunction
    32 Temperature Door Potentiometer Open/Short Circuit (Passenger Side)
    33 Temperature Door Potentiometer Motor (Passenger Side)
    34 Console Temperature Door Potentiometer Open/Short Circuit
    35 Console Temperature Door Potentiometer Motor
    36 Console Temperature Door A Potentiometer Open/Short Circuit
    37 Console Temperature Door Potentiometer Motor
    38 Console Duct Actuator Open/Short Circuit
    39 Console Duct Actuator Motor
    43 Anti-Fog Potentiometer Open/Short Circuit
    44 Anti-Fog Potentiometer Motor
    45 APT (A/C Pressure Transducer) CAN Signal Malfunction
    47 RPM CAN Signal Malfunction
    48 Vehicle Speed CAN Signal Malfunction
    49 Engine Coolant Temperature CAN Signal Malfunction
    50 Cluster ionizer malfunction
    51 Rear Interior Temperature Sensor Open Circuit
    52 Rear Interior Temperature Sensor Short Circuit
    53 Console Duct Sensor Open Circuit
    54 Console Duct Sensor Short Circuit
    55 Cool & Warm Box - Thermistor Malfunction
    56 Cool & Warm Box - Peltier Malfunction
    57 Cool & Warm Box - Fan Pressure Malfunction
    58 Cool & Warm Box - Fan Lock
    59 Cool & Warm Box - Fan Malfunction
  3. Trouble Code Display
    1. Continuous Operation: No DTC or One DTC.
    2. Continuous Operation: Two or More DTCs.
    3. STEP Operation
      A. No DTC or one DTC is considered continuous operation.
      B. Two or more DTCs.
  4. If trouble codes are displayed during inspection, check the causes by referring to the trouble code table.
  5. Fail-safe
    No. Sensor and Signal Fail-Safe Function
    1 Vehicle Sensor 25°C (77°F)
    2 Rear Interior Sensor 25°C (77°F)
    3 Ambient Temperature Sensor 20°C (68°F)
    (Display: "---" °C or "---°F")
    4 Anti-Fog Sensor
    (Relative Humidity)    		 Humidity: 0%
    5 Cluster Ionizer -
    6 Evaporator Temperature Sensor -2°C (28.4°F)
    7 Refrigerant Temperature Sensor -
    8 Electronic Control Valve (ECV) -
    9 Vehicle Speed (VS) 0 km/h
    10 Vehicle Speed (VS) - TCU 0 km/h
    11 Engine Speed 650 rpm
    12 Engine Speed Error Signal 650 rpm
    13 Throttle Position Signal 0%
    14 Engine Coolant Temperature -2°C (28.4°F)
    15 A/C Compressor Maximum Torque Limit 0 N·m
    16 APT Sensor Output Value 0 hPa
    17 A/C Compressor Relay Activation -
    18 Target Engine Idle Speed -
    19 Console Duct Sensor -

    No. Actuator Fail-Safe Function
    1 Temperature Control Actuator Feedback Set temperature is 24 °C or lower: Maximum cooling
    Set temperature is 25 °C or higher: Max. heating
    2 Mode Control Actuator Feedback Vent: Vent
    Other: Defrost
    3 Intake Actuator Feedback Recirculation: Recirculation
    Other: Fresh
    4 Automatic Anti-Fog Actuator Feedback Vent and B/L: Close
    Other: Open
    5 Console Temperature Control Actuator Set temperature is 24 °C or lower: Maximum cooling
    Set temperature is 25 °C or higher: Max. heating
    6 Console Temperature Control Actuator A Feedback Set temperature is 24 °C or lower: Maximum cooling
    Set temperature is 25 °C or higher: Max. heating
    7 Console Duct Actuator Feedback Vent: Vent
    Other: Floor

    ? For more information, refer to the DTC manual.

Replacement
Wear gloves to protect your hands.
  • Use a plastic panel removal tool to remove the interior trim parts to prevent surface damage.
  • Be careful not to bend or scratch the trim and panels.
  1. Disconnect the negative (-) battery terminal.
  2. Remove the side garnish assembly [RH] (Refer to Body - "Side Air Bag Garnish Assembly [RH]")
  3. Remove the heater and A/C control unit from the center panel after loosening the mounting screws (A).
  4. Disconnect the A/C and heater controller connectors (A).
  5. Remove the heater and A/C control unit from the center panel after loosening the mounting screws.
  6. Install in the reverse order of removal.
    • Make sure the connector is properly connected.
    • Replace all damaged clips.

Test yourself

A quick Hyundai Genesis DH quiz: every answer comes with an explanation and a link to the manual page.