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# Kia Soul EV: Heater / Evaporator Core Repair procedures

Kia Soul EV (PS EV) 2015-2020 Service Manual / Heating,Ventilation, Air Conditioning / Heater / Evaporator Core Repair procedures

Replacement

• | Be sure to read and follow the “General Safety Information and Caution” before doing any work related with the high voltage system. Failure to follow the safety instructions may result in serious electrical injuries.
• | Be sure to shut off the high voltage before doing any work related with the high voltage system(Refer to "High Voltage Shut-off Procedure"). Failure to follow the safety instructions may result in serious electrical injuries.

• | Put on gloves to protect your hands.

• | When prying with a flat-tip screwdriver, wrap it with protective tape, and apply protective tape around the related parts, to prevent damage.
• | Use a plastic panel removal tool to remove interior trim pieces to protect from marring the surface.
• | Take care not to bend or scratch the trim and panels.

1. | Recover the refrigerant with a recovery/ recycling/ charging station.
• | Do not use the same A/C recovery / charging station as conventional belt-driven compressors.
• | Since the electric compressor uses high-voltage, POE oil with high resistivity should be used.
• | If PAG oil mixes into the POE oil of the system, dielectric breakdown may occur due to decreased volumetric resistivity and the A/C compressor may not work.

2. | Disconnect the negative (-) battery terminal.

3. | Shut off the high voltage circuit. (Refer to EV Battery System - "High Voltage Shut-off Procedure")

4. | Remove the heater and blower unit assembly. (Refer to Heater -"Heater Unit")
• | After loosening the bolts, remove the main crash pad and cowl cross bar assembly (A) altogether. (Refer to the below removal procedure.)

5. | Remove the fixing clip (A) after loosening the mounting screws.

6. | Remove the heater lower case (B) after loosenig the heater lower case mounting bolt (A).

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

8. | Install in the reverse order of removal.
• | Do not use the same A/C recovery / charging station as conventional belt-driven compressors.
• | Since the electric compressor uses high-voltage, POE oil with high resistivity should be used.
• | If PAG oil mixes into the POE oil of the system, dielectric breakdown may occur due to decreased volumetric resistivity and the A/C compressor may not work.
• | 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 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.

##### Heater Unit Repair procedures

Replacement • Be sure to read and follow the “General Safety Information and Caution” before doing any work related with the high voltage system. Fai ...

##### High Voltage PTC Heater Description and Operation

Operation Condition 1. The power supplied to the PTC heater should be within DC 240V - 420V (high voltage). 2. The power supplied to the PTC heater should be within 9.0V - 16.0V (low voltage). ...

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