Kia Rio: Heater Unit Replacement - Heater - Heating,Ventilation, Air Conditioning - Kia Rio UB 2012-2019 Service ManualKia Rio: Heater Unit Replacement

1.
Disconnect the negative (-) battery terminal.
2.
Recover the refrigerant with a recovery/recycling/charging station.
3.
When the engine is cool, drain the engine coolant from the radiator. (Refer to EM group - Coolant)
4.
Remove the expansion valve (A) from the evaporator core.

Tightening torque :
8.8 ~ 13.7 N.m ( 0.9 ~ 1.4 kgf.m, 6.5 ~ 10.1 Ib-ft)



     
Plug or cap the lines immediately after disconnecting them to avoid moisture and dust contamination.
When installing, replace with a new O-ring (B).
5.
Disconnect the inlet (A) and outlet (B) heater hoses from the heater unit.



     
Engine coolant will run out when the hoses are disconnected; drain it into a clean drip pan. Be sure not to let coolant spill on electrical parts or painted surfaces. If any coolant spills, rinse it off immediately.
6.
Remove the center console assembly.
(Refer to BD group - "Center Console")
7.
Remove the shift lever assembly.
(Refer to TM group - "Shift Lever")
8.
Lower the steering column after loosening the mounting bolts and nuts.
(Refer to ST group - "Steering Column")
9.
Remove the cowl top cover.
(Refer to BD group - "Cowl Top Cover")
10.
Loosen the cowl cross member mounting bolts (A).


11.
Remove the left front filler trim and disconnect the connector (A).


12.
Remove the right and left lower cover and then disconnect connectors (A).



13.
Disconnect the fuse box connectors (A).


14.
Remove the air duct (A).


15.
Disconnect the airbag connector (A).


16.
Remove the photo sensor.
(Refer to HA group - "Photo Sensor")
17.
Remove the heater & A/C control unit.
(Refer to HA group - " Heater & A/C Control Unit ")
18.
Loosen the heater & blower unit mounting bolts (A).


19.
Remove the AUX unit.
(Refer to BE group - "Multimedia Jack")
20.
Disconnect the smart key antenna connector (A).



     
Be careful that the inlet and outlet pipe are not bent during heater core and evaporator core removal/installation.
21.
Remove the glove box.
(Refer to BD group - "Crash Pad")
22.
Disconnect the cluster ionizer connector (A) and the foot actuator connector (B).


23.
Loosen the crash pad to heater unit mounting screw (A).


24.
Remove the heater & blower unit after loosening mounting bolt (A).


25.
Loosen the cowl cross member mounting bolts and than remove the crash pad and heater & blower unit assembly.


26.
Loosen the drain hose fixing clip under the vehicle.
27.
Disconnect the heater unit connectors.
28.
Remove the heater & blower unit (A) from the crash pad after loosening the mounting nuts.


29.
Separate the blower unit from the heater unit after loosening the screws.


30.
Remove the heater core cover (A) after loosening the mounting screws.


31.
Pull out the heater core (A) from heater unit.


32.
Remove the heater unit lower case (A) after loosening the mount screws.


33.
Pull out the evaporator core (A) from heater unit.



     
Be careful that the inlet and outlet pipe are not bent during heater core and evaporator core removal/installation.
34.
Install in the reverse order of removal.
A.
If you're installing a new evaporator, add refrigerant oil (PAG OIL).
B.
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 to avoid leakage.
C.
Immediately after using the oil, replace the cap on the container, and seal it to avoid moisture absorption.
D.
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
E.
Apply sealant to the grommets.
F.
Make sure that there is no air leakage.
G.
Charge the system and test its performance.
H.
Do not interchange the inlet and outlet heater hoses and install the hose clamps securely.
I.
Refill the cooling system with engine coolant
Heater Unit Components
1. Shower Duct (Left) 2. Heater Pipe Cover 3. Mode Control Actuator 4. Mode Control Actuator Bracket 5. Defog mode lever (FATC) 6. Mode Control Main Lever (MANUAL) 7. Vent ...

Temperature Control Actuator Description
The heater unit includes mode control actuator and temperature control actuator. The temperature control actuator is located at the heater unit. It regulates the temperature by the proced ...

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