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Water Leak with AC in my Suburban

MrMav

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MrMav Enthusiast

MrMav

Posted
Posted

I noticed today that on the passenger side on my Suburban (03), underneath, water drips out at a pretty fast rate when the AC is on.

 

 

There are acutually 2 drips from that area, both with the AC on. One is pretty slow and it's just condensation from the AC being on. The other one, that I'm concerned about, is very fast.

 

 

When I turn off the AC, the slow drip stops almost immediately, the fast one graudually slows down and eventually stops..

 

 

 

Anyone have any idea of what the problem is?

 

Thanks

OUMike Senior Enthusiast

OUMike

Posted
Posted
I noticed today that on the passenger side on my Suburban (03), underneath, water drips out at a pretty fast rate when the AC is on.

 

 

There are acutually 2 drips from that area, both with the AC on. One is pretty slow and it's just condensation from the AC being on. The other one, that I'm concerned about, is very fast.

 

 

When I turn off the AC, the slow drip stops almost immediately, the fast one graudually slows down and eventually stops..

 

 

 

Anyone have any idea of what the problem is?

 

Thanks

 

 

 

 

Howdy. I have a 94' Silverado that does the exact same thing. I've been told a couple things.

 

1) the drain plug by the firewall is plugged. Blow it out with an air compressor and that shiould the trick. I did this and it seemed to work a for a bit, but now its doing it again.

 

2) the evaporator case is cracked/clogged. It will have to be opened and cleaned or replaced. Cleaning isn't so expensive, but the replacement was like $750.

 

I stuck a towel up inside my floor board so the drip hits the towel and not the carpet. It seems to do pretty well, but it did it for a while before I realized it, so I'm sure my padding under that spot is ruined. No sense in replacing the padding wihtout fixing the leak. If you find a fix, by all means let me know. I hate it, but I'm living with it. Mine doens't do it at all when the AC is off. I live in Houston, and its July..so thats pretty much never.

 

I tried to open the case myself, but was unsucessful. Apparently its nearly impossible to get it off unless you really know what your doing (I don't), so I didn't get very far. I can see the drip, but can't really do much about it.

 

Hope this helps.

MrMav Enthusiast

MrMav

Posted
  • Author
Posted
I noticed today that on the passenger side on my Suburban (03), underneath, water drips out at a pretty fast rate when the AC is on.

 

 

There are acutually 2 drips from that area, both with the AC on. One is pretty slow and it's just condensation from the AC being on. The other one, that I'm concerned about, is very fast.

 

 

When I turn off the AC, the slow drip stops almost immediately, the fast one graudually slows down and eventually stops..

 

 

 

Anyone have any idea of what the problem is?

 

Thanks

 

 

 

 

Howdy. I have a 94' Silverado that does the exact same thing. I've been told a couple things.

 

1) the drain plug by the firewall is plugged. Blow it out with an air compressor and that shiould the trick. I did this and it seemed to work a for a bit, but now its doing it again.

 

2) the evaporator case is cracked/clogged. It will have to be opened and cleaned or replaced. Cleaning isn't so expensive, but the replacement was like $750.

 

I stuck a towel up inside my floor board so the drip hits the towel and not the carpet. It seems to do pretty well, but it did it for a while before I realized it, so I'm sure my padding under that spot is ruined. No sense in replacing the padding wihtout fixing the leak. If you find a fix, by all means let me know. I hate it, but I'm living with it. Mine doens't do it at all when the AC is off. I live in Houston, and its July..so thats pretty much never.

 

I tried to open the case myself, but was unsucessful. Apparently its nearly impossible to get it off unless you really know what your doing (I don't), so I didn't get very far. I can see the drip, but can't really do much about it.

 

Hope this helps.

 

 

 

 

Sorry, just to clarify, the leak is underneath the car. It drips onto the ground. Thanks for the advice though!

C & A s Dad Senior Enthusiast

C & A s Dad

Posted
Posted

If it is dripping to the ground you are in good shape. In real humid weather that baby will produce some condensation. If you have rear air, you will also notice a puddle at the right rear.

MrMav Enthusiast

MrMav

Posted
  • Author
Posted
If it is dripping to the ground you are in good shape. In real humid weather that baby will produce some condensation. If you have rear air, you will also notice a puddle at the right rear.

 

 

 

 

 

So its normal for it to be dripping from 2 places? The rear airs off and the drips are coming from the front of the car. Humidity is about 70% today.

C & A s Dad Senior Enthusiast

C & A s Dad

Posted
Posted

My bet is that the flow coming from the evap core is hitting something and making it run off in two places. You may still want to check the drain tube to make sure it is not partially blocked.

 

I have been driving Dodge Caravans with my work for years and typically I have to clean the evap drain tube once a year or I begin getting some really cold water dripping in the passenger floorboard.

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