Auto Repair - Roadshow forum


Where is the fresh air/ recirculation flap/valve located?

I have a 2011 Hyundai sonata,
I suspect the outside fresh air flap is non-functional.
I regularly experience fogging even though the fresh air-vent is open + A/C on.
With the A/C on + fresh air vent open and directed to the windows, only a very small portion of fog gets cleared. During the winter it is so bad that the fog freezes up turns into ice, I have to store a mini ice-scraper in the glove box for this very purpose.
I'd like to get this fixed asap. whenever I take it to the mechanic they keep trying to teach me how to operate the vent to clear the fog. i already know this!, I'm tired of trying to explain i want to just fix it myself.

FYI I own 2 cars, this is the only one with the fogging issue.

I am highly confident the culprit is the re-circulation flap/valve system non functioning, its either the motor or the valve itself. I want to just find out where this flap would be located in order to verify. I tried searching online with no success.

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All Answers

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Every where I looked, no exact video.

In reply to: Where is the fresh air/ recirculation flap/valve located?

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It's not easily accessible

In reply to: Where is the fresh air/ recirculation flap/valve located?

Below almost all windshields there's a drain tray for rain, also where wiper motor and the actuation arms are stored. Typically it drains to one or both side fender areas. Down near where it drains, usually passenger side, is where the fresh air is let in, however the door that opens for that is often on the backside of the entire AC/Heater box. It's more likely you have a clogged AC drain instead. Do you ever hear a fan hitting water, or flecks of water come out of vents at you? If so, crawl under the car at front of passenger door behind the wheel and look up. You will see a tube, often with a small flat rubber nipple on it and that's where it drains. Another way is on a hot day and you have run AC, you may see a wet area under there and can look up and see it. Sometimes that gets totally clogged however and needs a wire or thin wire brush run up into it so the AC water will drain. Make sure to check that and be sure it's clean and draining, or you also get a mold smell build up on the catch tray in the AC area.

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My car does not experience those symptoms.

In reply to: It's not easily accessible

I do not experience those symptoms such as the wet floor or water splashing. The car sounds normal.

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that's a possible symptom, but not required

In reply to: My car does not experience those symptoms.

Not everyone does experience that. You have a humidity problem in the car though, and that's the most likely source of it, based on what you described. Running the AC can actually make that worse. Better would be crack a window, just use the dry heat, and eventually the humidity level will drop inside.

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