1.Disconnect the negative (-) battery terminal.
2.Remove the heater and blower assembly.(Refer to Heater - "Heater Unit")
3.Loosen the mounting screws and remove the heater core cover (A).

4.Separate the heater core (A) from the heater unit.


5.Install in the reverse order of removal.
• Refill the cooling system with engine coolant.
• Do not interchange the inlet and outlet heater hoses and install the hose clamps securely.
• Make sure that there is no air leakage.
• Charge the system and test its performance.
Heater Unit
Evaporator CoreHyundai Tucson (NX4) 2022-2025 Service Manual: Intake Air Temperature Sensor (IATS)
- Description
Intake Air Temperature Sensor (IATS) is included inside Manifold
Absolute Pressure Sensor and detects the intake air temperature.To
calculate precise air quantity, correction of the air temperature is
needed because air density varies according to the temperature. So the
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Hyundai Tucson (NX4) 2022-2025 Service Manual: Purge Control Solenoid Valve (PCSV)
- Description
Purge Control Solenoid Valve (PCSV) is a solenoid valve and is
installed on the surge tank and controls the passage between the
canister and the intake manifold.The evaporative gases gathered in the
canister are delivered to the intake manifold when the PCSV is open by
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