Kia Rio: Heater / Heater Unit

Kia Rio 2017-2024 YB Service Manual / Heating,Ventilation, Air Conditioning / Heater / Heater Unit

Components and components location
Component Location


1. Heater pipe cover
2. Heater core
3. Mode control actuator
4. Mode control actuator bracket
5. Mode control main lever
6. Evapoerator sensor
7. PTC Heater core(350W)
8. PTC Heater core(1000W)
9. Heater case

1. Heater lower case
2. Door assembly (TEMP)
3. Door assembly (FOOT)
4. Door assembly (VENT)
5. Door assembly (DEF)
6. Evapoerator core
7. Evapoerator Flange
8. Seal
9. Seal (Non A/C)
10. NVH Pad
11. Defog actuator
12. Tempature control actuator
13. Aspirator hose
14. Heater case (RH)
15. Drain hose

Repair procedures

Disconnect the negative (-) battery terminal.


Recover the refrigerant with a recovery/recycling/charging station.


Drain the coolant.

D 1.4 TCI-U2 (Refer to Engine Mechanical System - "Coolant")

G 1.0 T-GDI-KAPPA (Refer to Engine Mechanical System - "Coolant")

G 1.2 MPI-KAPPA(Refer to Engine Mechanical System - "Coolant")

G 1.4 MPI-KAPPA(Refer to Engine Mechanical System - "Coolant")


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).


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.


Remove the console assembly.

(Refer to Body - "Floor Console Assembly")


Remove the shift lever assembly.

(Refer to Manual Transaxle System - "Shift Lever Assembly.")


Lower the steering column after loosening the mounting bolts and nuts.

(Refer to Steering System - "Steering Column and Shaft")


Remove the wiper motor.

(Refer to Body Electrical System - "Front wiper motor")


Loosen the cowl cross member mounting bolts.


Remove the crash pad.

(Refer to Body - "Main Crash Pad Assembly")


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


Loosen the drain hose fixing clip under the vehicle.


Disconnect the heater unit connectors.


Remove the heater & blower unit (A) from the crash pad after loosening the mounting nuts.


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


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


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


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


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.


Installation is the reverse order of removal.

If you're installing a new evaporator, 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 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


Temperature Control Actuator
Description and operation Description The heater unit includes mode control actuator and temperature control actuator. The temperature control actuator is located at the heater unit. ...

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