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HVAC blowing only on feet vents

Tiny
MARK87
  • MEMBER
  • 2010 HYUNDAI I20
  • 1.4L
  • 4 CYL
  • 2WD
  • MANUAL
  • 78,000 MILES
Hi, when I put my A/C on and I select the dash vent only I can feel the air coming from the feet vents. Also, which ever position you select the selector knob I can feel
the air from the feet vents.
Is there a problem with the blend door actuator or could it be something else?
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Saturday, December 19th, 2020 AT 12:33 AM

6 Replies

Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
This is the mode door actuator that is not operating properly. Here is a guide that talks about this. Normally it goes to defrost only but this is only when it fails.

https://www.2carpros.com/articles/air-vents-stay-in-the-defrost-position

I also attached below the process from a manual of the USA version of this vehicle. We don't have a manual on this vehicle because it is not offered here in the USA. So this process will be close if it is not exactly matched to your vehicle.

Let us know what questions you have. Thanks
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Saturday, December 19th, 2020 AT 4:26 PM
Tiny
MARK87
  • MEMBER
  • 61 POSTS
I replaced the mode door actuator, cold air coming out of dash vents only.
Many thanks for the help.
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Saturday, December 26th, 2020 AT 2:15 AM
Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
So it was coming out of the feet vents only and you replaced the mode door actuator now it is coming out of the dash vents only?

If this is the case, I suspect you have a faulty actuator.
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Saturday, December 26th, 2020 AT 4:22 PM
Tiny
MARK87
  • MEMBER
  • 61 POSTS
It was coming from both feet and dash vents when I select the knob for dash vents. I went on to replace the mode door actuator, seems to be responding well. When I select the knob on dash vents cold air coming from dash vents only, which should be the case. I am monitoring to see if it stays this way.

Should I be replacing any other actuator?
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Sunday, December 27th, 2020 AT 9:27 AM
Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
Okay. Sounds good. As for the other actuators, you only replace them if there is an issue. You have 3 basic actuators. The blend door is for the air temperature. The mode door is to direct the air in the defrost, panel, or floor. The fresh air door is for fresh air or recirculation.

So if the air is blowing out of the vent that you are selecting then it sounds like it is working.
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Monday, December 28th, 2020 AT 4:11 PM
Tiny
MARK87
  • MEMBER
  • 61 POSTS
Many thanks.
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Wednesday, December 30th, 2020 AT 8:35 PM

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