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Hyundai Equus Manuals

Hyundai Equus: Troubleshooting - General Information - Heating, Ventilation and Air Conditioning - Hyundai Equus VI 2009-2025 Service ManualHyundai Equus: Troubleshooting

Second generation VI (2009–2025) / Hyundai Equus VI 2009-2025 Service Manual / Heating, Ventilation and Air Conditioning / General Information / 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
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    Air Conditioning System
    ...

    See also:

    Blower Unit Repair procedures
    Replacement 1. Disconnect the negative (-) battery terminal. 2. Remove the heater and blower assembly. (Refer to Heater - "Heater Unit") 3. Separate the blower unit (A) from the heater un ...

    Fuel Pressure Sensor (FPS) Description and Operation
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    Reset items
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