Hyundai Elantra (CN7): Heating, Ventilation and Air Conditioning / Troubleshooting

Hyundai Elantra (CN7) 2021-2026 Service Manual / Heating, Ventilation and Air Conditioning / 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
Blower fuse
Blower relay
Blower motor
Power mosfet
Blower speed control switch
Wire harness
No air temperature control
Engine coolant capacity
Heater control assembly
No compressor operation
Refrigerant capacity
A/C fuse
Compressor
A/C pressure transducer
A/C switch
Evaporator temperature sensor
Wire harness
Vented air not cold
Refrigerant capacity
Refrigerant pressure
Drive belt
Compressor
A/C pressure transducer
Evaporator temperature sensor
A/C switch
Heater control assembly
Wire harness
Insufficient cooling
Refrigerant capacity
Drive belt
Compressor
Condenser
Expansion valve
Evaporator
Refrigerant lines
A/C pressure transducer
Heater control assembly
No engine idle-up when A/C switch ON
Engine ECM
Wire harness
No air inlet control
Heater control assembly
No mode control
Heater control assembly
Mode actuator
No cooling fan operation
Cooling fan fuse
Fan motor
Engine ECM
Wire harness

    SpecificationAir Conditioner Item Specification CompressorTypeGamma 1.6 MPI, Gasoline 2.0 NU MPI, Gasoline 1.

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    Hyundai Elantra (CN7) 2021-2026 Service Manual: Climate Control Air Filter

    Description and operation Description The climate control air filter is located in the blower unit. It eliminates foreign materials and odor. The particle filter performs a role as an odor filter as well as a conventional dust filter to ensure comfortable interior environment.

    Hyundai Elantra (CN7) 2021-2026 Service Manual: Intake Actuator

    Description and operation DescriptionThe intake actuator is located at the blower unit. It regulates the intake door by a signal from the control unit. Pressing the intake selection switch will shift between recirculation and fresh air modes. Components and components location Components Location1.

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