Kia Sedona (2008 year). Manual - part 36

Air conditioner operation depends on ambient temperature and humidity.

Fig. 11: Identifying Humidity Sensor Terminals 
Courtesy of KIA MOTORS AMERICA, INC. 

INSPECTION 

1. Ignition "ON"  

2. Using the scan tool.  

3. Check the frequency of humidity sensor between terminals 2 and 3. 

HUMIDITY SPECIFICATION 

4. If the measured resistance is not specification, substitute with a known-good humidity sensor and check 

for proper operation.  

5. If the problem is corrected, replace the Humidity sensor.  

REPLACEMENT 

1. Disconnect the negative (-) battery terminal.  

2. Remove the center fascia lower panel. Refer to INTERIOR .  

3. Disconnect the humidity sensor connector (A).  

4. Loosen 2 screws and then remove the humidity sensor (B). 

Humidity (%)

Frequency between terminals 2 and 3 (Hz)

30

6976 ± 5%

50

6728 ± 5%

60

6600 ± 5%

70

6468 ± 5%

80

6330 ± 5%

90

6186 ± 5%

 

2008 Kia Sedona EX 

2008 HVAC A/C Compressor Controls (Full Auto) - Sedona

  

Microsoft 

 

Monday, May 24, 2010 3:58:11 PM

Page 10 

© 2006 Mitchell Repair Information Company, LLC. 

Fig. 12: Disconnecting Humidity Sensor Connector 
Courtesy of KIA MOTORS AMERICA, INC. 

5. Installation is the reverse order of removal. 

 

2008 Kia Sedona EX 

2008 HVAC A/C Compressor Controls (Full Auto) - Sedona

  

Microsoft 

 

Monday, May 24, 2010 3:58:11 PM

Page 11 

© 2006 Mitchell Repair Information Company, LLC. 

2008 HVAC

Air Conditioning System (General Servicing) - Sedona 

INSTRUCTIONS 

WHEN HANDLING REFRIGERANT 

1. R-134a liquid refrigerant is highly volatile. A drop on the skin of your hand could result in localized 

frostbite. When handling the refrigerant, be sure to wear gloves.  

2. It is standard practice to wear goggles or glasses to protect your eyes, and gloves to protect your hands. If 

the refrigerant splashes into your eyes, wash them with clean water immediately.  

3. The R-134a container is highly pressurized. Never leave it in a hot place, and check that the storage 

temperature is below 52°C (126°F).  

4. An electronic leak detector should be used to check the system for refrigerant leakage. Bear in mind that 

the R-134a, upon coming into contact with flame, produces phosgene, a highly toxic gas.  

5. Use only recommended the lubricant for R-134a systems. If lubricants other than the recommended one 

used, system failure may occur.  

6. PAG lubricant absorbs moisture from the atmosphere at a rapid rate, therefore the following precautions 

must be observed: 



When removing refrigerant components from a vehicle, cap immediately the components to 
prevent from the entry of moisture.  



When installing refrigerant components to a vehicle, do not remove the cap until just before 
connecting the components.  



Complete the connection of all refrigerant tubes and hoses without delay to prevent the A/C system 
from taking on moisture.  



Use the recommended lubricant from a sealed container only.  

7. If an accidental discharge in the system occurs, ventilate the work area before resuming service. 

Fig. 1: Precaution For Handling Refrigerant 
Courtesy of KIA MOTORS AMERICA, INC.

 

2008 Kia Sedona EX 

2008 HVAC Air Conditioning System (General Servicing) - Sedona

  

 

2008 Kia Sedona EX 

2008 HVAC Air Conditioning System (General Servicing) - Sedona

  

Microsoft 

 

Monday, May 24, 2010 4:02:02 PM

Page 1 

© 2006 Mitchell Repair Information Company, LLC. 

Microsoft 

 

Monday, May 24, 2010 4:02:05 PM

Page 1 

© 2006 Mitchell Repair Information Company, LLC. 

WHEN REPLACING PARTS ON A/C SYSTEM

1. Never open or loosen a connection before discharging the system.  

2. Seal the open fittings of components with a cap or plug immediately to prevent intrusion of moisture or 

dust.  

3. Do not remove the sealing caps from a replacement component until it is ready to be installed.  

4. Before connecting an open fitting, always install a new sealing ring. Coat the fitting and seal with 

refrigerant oil before making the connection. 

Fig. 2: Precaution For Replacing Parts On A/C System 
Courtesy of KIA MOTORS AMERICA, INC. 

WHEN INSTALLING CONNECTING PARTS 

FLANGE WITH GUIDE PIN 

Check the new O-ring for damage (use only the specified) and lubricate it using compressor oil. Tighten the nut 
to specified torque. 

Fig. 3: Precaution For Connecting Parts 
Courtesy of KIA MOTORS AMERICA, INC.

 

2008 Kia Sedona EX 

2008 HVAC Air Conditioning System (General Servicing) - Sedona

  

Microsoft 

 

Monday, May 24, 2010 4:02:02 PM

Page 2 

© 2006 Mitchell Repair Information Company, LLC.