Heater System Hyundai Santa Fe III

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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 «COOLANT»(/hyundai/santa-fe/iii-2012-2016/remont/cooling-system-mechanical/#engine-cooling-system) .
4. Remove the expansion valve cover (A).
5. Remove the expansion valve (A) from the evaporator core. Tightening torque: 7.8 ~ 11.7 N.m (0.8 ~ 1.2 kgf.m, 5.7 ~ 8.6 lb-ft) NOTE: Plug or cap the lines immediately after disconnecting them to avoid moisture and dust contamination. When installing, replace with a new O-ring (B).
6. Disconnect the inlet (A) and outlet (B) heater hoses from the heater unit. CAUTION: 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.
7. Remove the cowl top cover. Refer to «REPLACEMENT»(/hyundai/santa-fe/iii-2012-2016/remont/exterior-body-panels/#cowl-top-cover) .
8. Remove the front pillar trim. Refer to «FRONT PILLAR TRIM»(/hyundai/santa-fe/iii-2012-2016/remont/exteriorinterior-trim/#interior-trim) .
9. Remove the front seat assembly. Refer to «FRONT SEAT ASSEMBLY»(/hyundai/santa-fe/iii-2012-2016/remont/seats/#front-seat) .
10. Remove the floor console assembly. Refer to «FLOOR CONSOLE ASSEMBLY»(/hyundai/santa-fe/iii-2012-2016/remont/exteriorinterior-trim/#floor-console) .
11. Remove the shift lever assembly. Refer to «SHIFT LEVER»(/hyundai/santa-fe/iii-2012-2016/remont/automatic-trans/#automatic-transaxle-control-system) .
12. Remove the cowl side trim. Refer to «COWL SIDE TRIM»(/hyundai/santa-fe/iii-2012-2016/remont/exteriorinterior-trim/#interior-trim) .
13. Remove both sides of the crash pad side cover. Refer to «CRASH PAD SIDE COVER»(/hyundai/santa-fe/iii-2012-2016/remont/gauges-instrument-panels/#crash-pad) .
14. Remove the crash pad lower panel. Refer to «CRASH PAD LOWER PANEL»(/hyundai/santa-fe/iii-2012-2016/remont/gauges-instrument-panels/#crash-pad) .
15. Remove the passenger side crash pad under cover (A).
16. Remove the steering wheel. Refer to «REMOVAL»(/hyundai/santa-fe/iii-2012-2016/remont/steering-column/#steering-wheel) .
17. Remove the multifunction switch. Refer to «REMOVAL»(/hyundai/santa-fe/iii-2012-2016/remont/steering-column-switches/#multifunction-switch) .
18. Remove the steering column shroud panel. Refer to «STEERING COLUMN SHROUD PANEL»(/hyundai/santa-fe/iii-2012-2016/remont/gauges-instrument-panels/#crash-pad) .
19. Lower the steering column after loosening the mounting bolts. Refer to «STEERING COLUMN AND SHAFT»(/hyundai/santa-fe/iii-2012-2016/remont/electronic-steering/#electric-power-steering) .
20. Remove the glove box housing. Refer to «GLOVE BOX HOUSING»(/hyundai/santa-fe/iii-2012-2016/remont/gauges-instrument-panels/#crash-pad) .
21. After loosening the mounting bolts, remove the rear air duct (A).
22. Disconnect the passenger compartment junction box connectors (A).
23. Disconnect the multi box connectors (A). [Driver's side] [Passenger's side]
24. Disconnect the airbag control module (SRSCM) connector (A).
25. Disconnect the connector (A) and the mounting clips in the front pillar. [Driver's side] Passenger's side]
26. After loosening the nuts and bolts remove the main crash pad (A) and cowl cross bar assembly (A) together.
27. Loosen the drain hose fixing clip under the vehicle.
28. Disconnect the heater unit connectors.
29. Remove the heater and blower unit from the crash pad after loosening the mounting nuts.
30. Separate the blower unit from the heater unit after loosening the screws.
31. Install in the reverse order of removal.

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1. Disconnect the negative (-) battery terminal.
2. Remove the heater and blower assembly. Refer to «HEATER UNIT»(/hyundai/santa-fe/iii-2012-2016/remont/heater/#heater-system) .
3. Remove the heater core cover (A) after loosening the mounting screws.
4. Pull out the heater core (A) from the heater unit.
5. Install in the reverse order of removal. If you're 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 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.

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1. Disconnect the negative (-) battery terminal.
2. Remove the heater and blower assembly. Refer to «HEATER UNIT»(/hyundai/santa-fe/iii-2012-2016/remont/heater/#heater-system) .
3. Remove the heater unit lower case (A) after loosening the mounting screws.
4. Pull out the evaporator core (A) from the heater unit. NOTE: Be careful that the inlet and outlet pipe are not bent during heater core and evaporator core removal/installation.
5. Install in the reverse order of removal. 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.

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 procedure as follows.

Signal from control unit adjusts the position of the temperature door by operating the temperature switch. Then the temperature will be regulated by the hot/cold air ratio decided by the position of the temperature door.

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1. Turn the ignition switch OFF.
2. Disconnect the temperature control actuator connector.
3. Verify that the temperature control actuator operates to the cool position when connecting 12V to terminal 3 and grounding terminal 7. Verify that the temperature control actuator operates to the warm position when connected in reverse.
4. Connect the temperature control actuator connector.
5. Turn the ignition switch ON.
6. Check the voltage between terminal 5 and 6. VOLTAGE SPECIFICATION Door Position Voltage (V) Error Detecting Max. cooling 0.3±0.15 Low voltage: 0.1V or less High voltage: 4.9V or less Max. heating 4.7±0.15 It will feedback the current position of the actuator to controls.
7. If the measured voltage is not within specification, substitute with a known-good temperature control actuator and check for proper operation.
8. Replace the temperature control actuator if it is proved that there is a problem with it.

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1. Disconnect the negative (-) battery terminal.
2. Using a screwdriver or remover, remove the driver's side crash pad side cover.
3. After loosening the mounting screws, remove the crash pad lower panel (A).
4. Disconnect the diagnosis connector (A).
5. Remove the driver's side shower duct (A) after loosening the screw.
6. Disconnect the temperature control actuator connector (A).
7. Disconnect the connector and then remove the temperature control actuator (A) after loosening the mounting screws.
8. Install in the reverse order of removal.

Scheme 28

1. Disconnect the negative (-) battery terminal.
2. Remove the glove box housing. Refer to «GLOVE BOX HOUSING»(/hyundai/santa-fe/iii-2012-2016/remont/gauges-instrument-panels/#crash-pad) .
3. Disconnect the connector (A) and then remove the temperature control actuator (B) after loosening the mounting screws.
4. Install in the reverse order of removal.

The mode control actuator is located at the heater unit.

It adjusts the position of the mode door by operating the mode control actuator based on the signal of the A/C control unit. Pressing the mode select switch makes the mode control actuator shift in order of Vent --> Bi-Level --> Floor --> Mix.

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1. Turn the ignition switch OFF.
2. Disconnect the mode control actuator connector.
3. Verify that the mode control actuator operates to the defrost mode when connecting 12V to terminal 3 and grounding terminal 7. Verify that the mode control actuator operates to the vent mode when connected in reverse.
4. Connect the mode control actuator connector.
5. Turn the ignition switch ON.
6. Check the voltage between terminal 5 and 4. VOLTAGE SPECIFICATION Door position Voltage (V) Error detecting Vent 0.3±0.15 Low voltage: 0.1V or less High voltage: 4.9V or less Defrost 4.7±0.15 It will feedback the current position of the actuator to controls.
7. If the measured voltage is not within specification, substitute with a known-good mode control actuator and check for proper operation.
8. Replace the mode control actuator if it is proved that there is a problem with it.

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1. Disconnect the negative (-) battery terminal.
2. Using a screwdriver or remover, remove the driver's side crash pad side cover.
3. After loosening the mounting screws, remove the crash pad lower panel (A).
4. Disconnect the diagnosis connector (A).
5. Remove the driver's side shower duct (A) after loosening the screw.
6. Disconnect the connector (A) and then remove the mode control actuator (B) after loosening the mounting screws.
7. Install in the reverse order of removal.

The auto defogging sensor is installed on the front window glass. The sensor judges and sends signal if moisture occurs to blow out wind for defogging. The air conditioner control module receives a signal from the sensor and restrains moisture and eliminates defog by the intake actuator, A/C, auto defogging actuator, blower motor RPM and mode actuator.

Scheme 35

1. Turn the ignition switch OFF.
2. Disconnect the auto defogging connector.
3. Verify that the auto defogging actuator operates to the open position when connecting 12V to terminal 3 and grounding terminal 7. Verify that the auto defogging actuator operates to the close position when connected in reverse.
4. Connect the auto defogging actuator connector.
5. Turn the ignition switch ON.
6. Check the voltage between terminals 5 and 6. VOLTAGE SPECIFICATION Door position Voltage (V) Error detecting Defog OFF (CLOSE) 4.7±0.15 Low voltage: 0.1V or less High voltage: 4.9V or less Defog ON (OPEN) 1.59±0.15 It will feedback the current position of the actuator to controls.
7. If the measured voltage is not within specification, substitute with a known-good auto defogging actuator and check for proper operation.
8. Replace the auto defogging actuator if it is proved that there is a problem with it.

Scheme 36

1. Disconnect the negative (-) battery terminal.
2. Remove the glove box housing. Refer to «GLOVE BOX HOUSING»(/hyundai/santa-fe/iii-2012-2016/remont/gauges-instrument-panels/#crash-pad) .
3. Disconnect the connector and then remove the auto defogging actuator (A) after loosening the mounting screws.
4. Install in the reverse order of removal.

See also:
• COOLANT
• REPLACEMENT
• FRONT PILLAR TRIM
• FRONT SEAT ASSEMBLY
• FLOOR CONSOLE ASSEMBLY
• SHIFT LEVER
• CRASH PAD SIDE COVER
• REMOVAL
• REMOVAL
• STEERING COLUMN AND SHAFT
• HEATER UNIT