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Drivers' side A/C is much warmer than the passenger side A/C?

Tiny
OWARDIV
  • MEMBER
  • 2008 HYUNDAI SONATA
  • 3.3L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 107,000 MILES
I have been troubleshooting my driver side A/C. So far, I have replaced the blend door, however it still won’t move. I’m not sure if there is a fuse or if there is a calibration. I tried hooking up my multi meter to the plug while the key was on and I didn’t seem to get anything though it was tough to get full connection with the meters probes into the tiny plug and I couldn’t find a diagram online. Thank you for your help!
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Friday, June 23rd, 2023 AT 10:33 AM

9 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,942 POSTS
It says there is only one temperature control actuator, does your car have dual control? Here is the location of the actuators to make sure you have the correct one and the HVAC system wiring diagrams so you can see which wires to test and how the system works. Please check out this guide:

https://www.2carpros.com/articles/a-comprehensive-guide-to-understanding-and-fixing-an-automotive-hvac-system-blowing

Check out the images (below). Let us know what happens and please upload pictures or videos of the problem so we can see what's going on.

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Friday, June 23rd, 2023 AT 12:29 PM
Tiny
OWARDIV
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  • 5 POSTS
Hello Ken! Yes, I believe I have two then. The diagrams you listed say it’s on the passenger side however I replaced the blend door actuator that’s located on the driver side. The actuator I installed looked like this.
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Friday, June 30th, 2023 AT 4:17 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,942 POSTS
Yep, that looks like it, can you monitor the actuator when you work the controls to see if they move?
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Saturday, July 1st, 2023 AT 11:34 AM
Tiny
OWARDIV
  • MEMBER
  • 5 POSTS
When I switched between hot and cold on the temp dial the actuator or the disk that it’s attached to did not move.
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Saturday, July 1st, 2023 AT 3:46 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,942 POSTS
Okay, let's remove the actuator and try to move the blend door by hand to make it is not obstructed. Also, plug in the actuator and work the controls to confirm the actuator failure. Also, my info tells me there is only one temperature actuator so you may have the A/C system low on charge which can case this is as well here is a guide to help you go over the system also, I found additional images for the blend door actuator for temperature.

https://www.2carpros.com/articles/air-conditioner-how-to-add-freon

Check out the images (below). Let us know what happens and please upload pictures or videos of the problem so we can see what's going on.
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Monday, July 3rd, 2023 AT 12:27 PM
Tiny
OWARDIV
  • MEMBER
  • 5 POSTS
Ken,

Thank you, I’ll try to put a recharge kit on my system tonight. So, is the actuator under my driver side for if I upgrade my temperature controller? Is the car only using the passenger side blend for right now then?
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Monday, July 3rd, 2023 AT 1:52 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,942 POSTS
Is uses the one actuator for both sides, can you please upload an images of the HVAC controller so I can see what kind it is?
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Tuesday, July 4th, 2023 AT 9:50 AM
Tiny
OWARDIV
  • MEMBER
  • 5 POSTS
Ken, you are a life saver. I live in AZ, so I really needed this resolved and you have been a great mentor in guiding me to the fix. However, with my industrial maintenance experience I seemed to skip right to the parts changing and skipped the easy steps. I checked the refrigerant, and it was low! Once I added the proper PSI the air blows ice cold. Thank you again for all your help and I will be telling everyone about this site and your help.
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Tuesday, July 4th, 2023 AT 1:55 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,942 POSTS
Glad you could get it fixed, thanks for letting us know. Please use 2CarPros anytime we are here to help. Can you please leave us a rating? (Copy entire link)

https://www.google.com/search?q=2carpros&gs_ivs=1#lrd=0x80dcd47364be5d0d:0xba091aa4209f4497,1,,,&tts=0

and

https://www.sitejabber.com/reviews/2carpros.com

Thank you!
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Wednesday, July 5th, 2023 AT 9:37 AM

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