C-Class (W203) 2001-2007, C160, C180, C200, C220, C230, C240, C270, C280, C300, C320, C230K, C350, Coupe

water drip..

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Old Apr 9, 2011 | 10:48 AM
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water drip..

Guys, I'm just wondering about water dripping from the left side of my car, uneerneath of course. Just before the dashboard area..

From what I understand its the AC water.. Which is normal. I touched the water and its clear and definitely water. What I'm wondering is, just before the water starts to drip, alot, I can hear the water trickle from inside the car, probably from behind the dashboard. I can clearly hear the water run somewhere . And when I got down and peeked under the car I saw the puddle of water..

Is this normal? I mean I know AC drips are normal, but from all the car I have driven before I never actually heard the water trickle from behind the dashboard (or underneath the dash). And it seems to trickle a lot within a few minutes too.. I was previously stuck in traffic for about 40 minutes before I got home..
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Old Apr 9, 2011 | 04:54 PM
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late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Normal. Water drain is below the evaporator. You might have some dirt in the drain pipe. You should not hear it draining.

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Old Apr 10, 2011 | 12:39 AM
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Okay gets even wierder . Its extremy hot today so I decided to put my AC on the coldest setting.. And again I hear the water/liquid flowing somewhere under the dash again.. And suddenly my AC stop being cold. I turned the temperature back up to 22 and it becomes cold again.. Curious I pushed it all the way down again and it stays cold. Suggestions?
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Old Apr 10, 2011 | 02:52 PM
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Yes - I think what you are hearing is the refrigerant. Have the system recharged.
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Old Apr 10, 2011 | 09:19 PM
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Thanks Glyn, will have it recharged soon then, I assume that alone should solve the "running water sound" problem?
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Old Apr 11, 2011 | 06:46 AM
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Yes - should do.
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Old Apr 11, 2011 | 07:02 AM
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Thanks! Already scheduled for a trip to my indie tomorrow..
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Old Apr 12, 2011 | 05:33 AM
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Turns out my compressor suddenly died. So I changed it to a new one.. But now iw getting sounds as if my air blower is going high to low high to low and so on.. The air itself blows steady however. Aircon is also cold.

What gives?
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Old Apr 16, 2011 | 11:31 AM
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Guys, turns out my water drip/trickle sound is still there. It happens randomly, but most of the time when I punch my gas. However, I can't find any leaks.. Everything is dry.. Engine bay, under the car.. No smell of gas nor oil.. AC is running fine after the new compressor installment. No warnings either.. Help?
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Old Apr 16, 2011 | 11:34 AM
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I can literally hear it trickle behind my dashboard.. Doesn't happen all the time though, perhaps one or twice a day..
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Old Apr 16, 2011 | 04:42 PM
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Could be that your expansion valve is faulty.
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Old Apr 16, 2011 | 06:50 PM
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+1 - or check that the water drain to under the car is not restricted.

I'm still think it might be refrigerant noise. Get a good HVAC guy to check the system properly.

Last edited by Glyn M Ruck; Apr 17, 2011 at 12:23 PM.
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Old Apr 17, 2011 | 05:17 AM
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Shouldn't I get more symptoms if its the expansion valve?
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Old Apr 17, 2011 | 06:00 AM
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Just a thought .It could be opening too far and allowing too much fluid refrigerant through which is what you are hearing.

I wonder why your compressor failed ? .

I would visit a A/C expert.
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