Evaporator Core

Repair Procedures

Replacement

1. 1

   Disconnect the negative (-) battery terminal.

2. 2

   Loosen the mounting nuts, then remove the heater and blower unit from the protector cover.

   (See Heater - Heater)

3. 3

   Remove the heater unit seal (A).

   

4. 4

   Loosen the mounting screws, then remove the evaporator core cover (A).

   

5. 5

   Pull out the evaporator core (A) from the heater unit.

   

6. 6

   To install, reverse the removal procedure.

   • If installing a new heater 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 installation. Be sure to use the correct O-rings for R-134a or R-1234yf to prevent leaks.

   • Close the oil container cap immediately after use and seal it to prevent moisture absorption.

   • Do not spill refrigerant oil on the vehicle; it may damage the paint. If refrigerant oil gets on the paint, wipe it off immediately.

   • Apply sealant to the bushings.

   • Check that there is no air leakage.

   • Charge the system and check that it operates properly.

   • Do not interchange the heater inlet and outlet hoses, and make sure the hose is securely connected.