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 Owner's Manual: Electronic Stability Control (ESC)
Electronic Stability Control helps stabilize
the vehicle during cornering maneuvers.
ESC checks where you are steering and
where the vehicle is actually going. ESC
applies braking pressure to any one of
the vehicle's brakes and intervenes in the
engine management system to assist the
...
Hyundai Tucson (NX4) 2022-2025 Service Manual: Variable Intake Solenoid (VIS) Valve
- Description
Variable Intake manifold Solenoid (VIS) valve is installed on the
intake manifold. The VIS valve controls the vacuum modulator which
activates a valve in the intake manifold. The ECM opens or closes this
valve according to engine condition (Refer to below table).
Engine Cond ...