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 Service Manual: Relay Box (Engine Compartment)
- Inspection
Power Relay (Type A)
1.There should be continuity between the No.30 and No.87 terminals
when power and ground are connected to the No.85 and No.86 terminals.
2.There should be no continuity between the No.30 and No.87 terminals when power is disconnected.[Engine room relay box]
...
Hyundai Tucson (NX4) 2022-2026 Service Manual: Sunroof Assembly
- Components Location
1. Sunroof assembly
- Replacement
• When removing with a flat - tip screwdriver or remover, wrap
protective tape around the tools to prevent damage to components.
• Put on glove to protect your hands.
1.Remove the roof trim.(Refer to ...