Hyundai Tucson: Heater / Evaporator Core

- Replacement

1.Disconnect the negative (-) battery terminal.

2.Remove the heater core.(Refer to Heater - "Heater Core")

3.Loosen the mounting screws and remove the evaporator core cover (A).

4.Remove the evaporator core (A) from the heater unit.

5.Remove the evaporator temperature sensor (A) from the evaporator core.

6.Install in the reverse order of removal.

• If you're installing a new evaporator core, add refrigerant oil (PAG OIL).

• Replace the O-rings with new ones at each fitting, and apply a thin coat of refrigerant oil before installing them. Be sure to use the right O-rings for R-134a or R-1234yf to avoid leakage.

• Immediately after using the oil, replace the cap on the container, and seal it to avoid moisture absorption.

• Do not spill the refrigerant oil on the vehicle; it may damage the paint; if the refrigerant oil contacts the paint, wash it off immediately.

• Apply sealant to the grommets.

• Make sure that there is no air leakage.

• Charge the system and test its performance.

• Do not interchange the inlet and outlet heater hoses and install the hose clamps securely.

• Refill the cooling system with engine coolant.