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) 2022-2026 Owner's Manual: Mode selection
The mode selection button controls the direction of the air flow through the
ventilation
system.
The air flow outlet direction is cycled as
follows:
Face-Level (B, C, E)
Air flow is directed toward the upper
body and face. Additionally, each outlet
can be controlled to direct th ...
Hyundai Tucson (NX4) 2022-2026 Owner's Manual: Engine coolant temperature gauge
This gauge indicates the temperature
of the engine coolant when the ignition
switch is in the ON position.
NOTICE
If the gauge pointer moves beyond the
normal range area toward the H (Hot)
position, it indicates the engine coolant
is overheating.
Do not continue driving with an
over ...