VELOSTER(FS) >2013 > G 1.6 T-GDI > Heating,Ventilation, Air Conditioning > Heater > Heater Unit>Repair procedures  
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.
4.
Remove the expansion valve (A) from the evaporator core and then remove the cover (B).

Tightening torque :
7.8 ~ 11.7 N.m ( 0.8 ~ 1.2 kgf.m, 5.7 ~ 8.6 Ib-ft)

Plug or cap the lines immediately after disconnecting them to avoid moisture and dust contamination.
5.
Disconnect the inlet (A) and outlet (B) heater hoses from the heater unit and then remove the cover (C).

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.
(Refer to BD group - "Center Console")
7.
Remove the steering handle and column.
(Refer to ST group - "Steering Column")
8.
Remove the cowl top cover.
(Refer to BD group - "Cowl Top Cover")
9.
Remove the photo sensor.
(Refer to HA group - "Photo Senosr")
10.
Loosen the cowl cross member mounting bolts (A).

11.
Remove the left & right front filler trim and than disconnect the connectors (A).

12.
Disconnect the left & right multi box connectors (A).

13.
Disconnect the main fuse box connectros (A).

14.
Disconnect the air bag connectors (A).

15.
Remove the center facia panel (A).

16.
Loosen the heater & blower unit mounting bolt (A).

17.
Loosen the heater & blower unit mounting bolts (A).

18.
Loosen the cowl cross member mounting bolts (A) and then remove the crash pad and heater & blower unit assembly (B).

19.
Disconnect the connectors and then remove the heater & blower unit (A) from the crash pad.

20.
Remove the blower unit (A) from heater unit after loosening screws.

21.
Loosen the mounting screws and then remove the heater core cover (A).

22.
Disconnect the heater core (A) from heater unit.

23.
Loosen the heater unit lower case mount screws and then remove the heater unit lower case (A).

24.
Remove the evaporator core (A).

Be careful that the inlet and outlet pipe are not bent during heater core removal, and pull out the heater core.
25.
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