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: Smart Key
- Smart Key
Smart Key Code Saving
1.Connect the DLC cable of diagnostic tool to the data link connector
(16 pins) in driver side crash pad lower panel, turn the power on
diagnostic tool.
2.Select the 'S/W Management' and 'Car model'.
3.Select the 'Smart Key Unit' and 'Smart Key Code Sav ...
Hyundai Tucson (NX4) 2022-2026 Service Manual: Troubleshooting
- Basic Troubleshooting
Basic Troubleshooting Guide
Customer Problem Analysis Sheet
Basic Inspection Procedure
Measuring Condition Of Electronic Parts' Resistance
The measured resistance at high temperature after vehicle running may be
high or low. So all resistance must be measured a ...