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Old 09-05-2010, 11:15 AM   #1
netray
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Default 2008 Aura A/C Drain (Duck valve) Clogged

I searched the internet for information to unclog my A/C drain (Duck Valve) plug, I can’t find it under the hood on the lower firewall, and does anyone have pictures of the valve location? I can’t stand the smell coming out of my vents when the A/C is on.

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Old 09-05-2010, 12:19 PM   #2
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Default Re: 2008 Aura A/C Drain (Duck valve) Clogged

Is that what lets condensation drip when the A/C is running? I never realized there was actually a valve there. Makes sense, but I just figured it was an open hose/line.

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Old 09-05-2010, 12:44 PM   #3
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Default Re: 2008 Aura A/C Drain (Duck valve) Clogged

Yes, and I can't locate it. HELP

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Old 09-05-2010, 04:00 PM   #4
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Default Re: 2008 Aura A/C Drain (Duck valve) Clogged

I can't help you on where it is exactly but the general location is in the lower firewall area in the middle of where the HVAC box would be from the inside. Its just a small rubber valve to allow condensation to drain from moisture build up using the a/c in humid weather. Poking it open should allow water to drain out. Although this is for draining water, it can not cure sneaker stink as its always an issue for almost every car using a/c. Most new models have an antibacterial coating applied from the factory or added during warranty service complaints to lessen bacteria growth on the evaporator coils, the surface areas where condensation forms. To rid this on your own if not serviced by GM under warranty you'll have to practice a new routine prior to shutting off the a/c system as well as treating the HVAC box with alternate deodorizers. There's also replacement of the cabin air filter if your car has one and you forgot to replace it. This alone can make a world of difference.

The various deodorizers are Ozium, Frigi-Fresh, Frigi-Clean, and GM's HVAC treatment. In order from least to most expensive. The idea is to spray one of the first three products into the fresh air intake at medium fan speed set for a/c on or off so these products are directed onto the offending evaporator coils. The windows are left partially open while the deodorizers settle onto the coils. The engine can be left idling as the blower moves air through. Since these emit strong odors it should be done at the end of the day or when you won't be driving as soon as this is sprayed. Give it time to work, according to each products instructions, and you'll have removed most if not all of the offending odors. The next is to follow a set routine to allow a/c condensation to evaporate as much as possible before shutting off the engine. Leaving the a/c on or shutting it off just when shutting the engine off promotes bacterial growth from all the "fresh air" mixed in with condensation. The petri dish is in effect in every vehicle with a/c systems. The routine is to shut off the a/c and run in ventilate mode for the last few minutes or as much as you can stand the heat coming back into the car. By giving the coils a chance to have only air flowing over it instead of condensing moisture when the a/c is on will help dry off these coils and lessen the chances of continuing the growth of bacteria. Periodic treatment with one of the recommended products and filter changes will make your car smell better.

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Old 09-05-2010, 05:24 PM   #5
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Default Re: 2008 Aura A/C Drain (Duck valve) Clogged

Thanks for the infomation. I still would like to find the drian since I don't see any water drain under the car when the A/C is on.

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Old 09-18-2010, 12:07 AM   #6
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Default Re: 2008 Aura A/C Drain (Duck valve) Clogged

Quote:
Originally Posted by netray View Post
Thanks for the infomation. I still would like to find the drian since I don't see any water drain under the car when the A/C is on.
I've never seen water drain from my Aura, and I have run the A/C a LOT this summer. I don't have any kind of "wet" smell from the vents, either.

Are you sure its clogged, or maybe it drains some other way that it doesn't leave a big puddle under the car?

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Old 09-19-2010, 04:16 PM   #7
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Default Re: 2008 Aura A/C Drain (Duck valve) Clogged

Mine never leaves puddles either. My old Taurus would leave a nice puddle of water if you parked after running the ac. Wonder if it does something with the drippings? Is it possible it has some sort of container it keeps its drippings in and lets them evaporate out instead of just dumping them out? I have no idea, lol.

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Old 09-19-2010, 07:51 PM   #8
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Default Re: 2008 Aura A/C Drain (Duck valve) Clogged

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Originally Posted by gregh2000 View Post
Mine never leaves puddles either. My old Taurus would leave a nice puddle of water if you parked after running the ac. Wonder if it does something with the drippings? Is it possible it has some sort of container it keeps its drippings in and lets them evaporate out instead of just dumping them out? I have no idea, lol.
Are we talking about a/c or grilling hamburgers? That's an awful lot of drippings.

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Old 09-24-2010, 03:50 PM   #9
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Default Re: 2008 Aura A/C Drain (Duck valve) Clogged

I just peeled back the passenger side front carpet, and soaked up about a gallon of water from the floorboard and the sound insulation under the carpet.
I am going to attempt to clear the valve, and if not, then I will install my own drain. Has anyone else attempted this? If not, then I will attempt to post pics in a few days.

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Old 09-02-2013, 02:00 PM   #10
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Default Re: 2008 Aura A/C Drain (Duck valve) Clogged

I am dealing with the same problem on a 2008 Aura Green line. Can anyone help me locate the drain plug? I see a small black plastic knob tucked under edge of the heat shield above the exhaust pipe, could that be it?

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Old 09-02-2013, 04:39 PM   #11
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Default Re: 2008 Aura A/C Drain (Duck valve) Clogged

this thread from the malibu (sister to the aura) forum should help u out:

http://www.chevymalibuforum.com/foru...+Drain+Plugged

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Old 09-21-2013, 09:18 AM   #12
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Default Re: 2008 Aura A/C Drain (Duck valve) Clogged

I had the same problem this the last 2 summers. I had one hell of a time finding and had to enlist the help of someone with really small arms or reach it. It's on the fire wall in the middle of the car almost in front of the exhaust manifold. It's hidden by a heat shield. I was able to see it from the top by looking through my serpentine belt on the fire wall. You are looking for a small round white piece of plastic. I hope this helps.

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