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Hyundai Equus: Troubleshooting - General Information - Heating, Ventilation and Air Conditioning - Hyundai Equus VI 2009-2024 Service ManualHyundai Equus: Troubleshooting

Troubleshooting
Problem Symptoms Table
Before replacing or repairing air conditioning components, first determine if the malfunction is due to the refrigerant charge, air flow or compressor.
Use the table below to help you find the cause of the problem. The numbers indicate the priority of the likely cause of the problem. Check each part in order. If necessary, replace these parts.
After correcting the malfunction, check the complete system to ensure that performance is satisfactory.
Standard:
Symptom
Suspected Area
No blower operation
1. Blower fuse
2. Blower relay
3. Blower motor
4. Power mosfet
5. Blower speed control switch
6. Wire harness
No air temperature control
1. Engine coolant capacity
2. Heater control assembly
No compressor operation
1. Refrigerant capacity
2. A/C fuse
3. Compressor
4. A/C pressure transducer
5. A/C switch
6. Evaporator temperature sensor
7. Wire harness
Vented air not cold
1. Refrigerant capacity
2. Refrigerant pressure
3. Drive belt
4. Compressor
5. A/C pressure transducer
6. Evaporator temperature sensor
7. A/C switch
8. Heater control assembly
9. Wire harness
Insufficient cooling
1. Refrigerant capacity
2. Drive belt
3. Compressor
4. Condenser
5. Expansion valve
6. Evaporator
7. Refrigerant lines
8. A/C pressure transducer
9. Heater control assembly
No engine idle-up when A/C switch ON
1. Engine ECM
2. Wire harness
No air inlet control
1. Heater control assembly
No mode control
1. Heater control assembly
2. Mode actuator
No cooling fan operation
1. Cooling fan fuse
2. Fan motor
3. Engine ECM
4. Wire harness

    Special Service Tools
    Special Service Tools Tool (Number and name)IllustrationUse09977-3R000Disc & hub assembly bolt removerRemoval and installation of disc & hub assembly bolt ...

    Air Conditioning System
    ...

    See also:

    Front Hub / Knuckle / Tone Wheel Repair procedures
    Replacement 1. Loosen the wheel nuts slightly. Raise the vehicle, and make sure it is securely supported. 2. Remove the front wheel and tire (A) from front hub .     Be ca ...

    Easy Access Function
    When exiting the vehicle, the steering wheel will move away from the driver and the seat will move rearward when the engine is turned off. When entering the vehicle, the steering wheel will move to ...

    Hood Latch Release Handle Repair procedures
    Replacement 1. After loosening the mounting screw, then remove the hood latch release handle (A). 2. Installation is the reverse of removal.     • Make sure the hood latc ...

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