AC leaks on passenger side on 2005 Chevrolet Cobalt

I love my cobalt, for the most part, but ever since I've owned it there has been a water leak from under the dash on the passenger side. When my car was still barely under warranty I took it to the dealer and they couldn't find the problem, of course it wouldn't leak for them. Over the years this problem has gotten worse. This year I had to use the wet-dry vac to vacuum up about 1/2 inch of standing water. I have noticed that if the window is cracked open while the ac is on I get about 1 drip per second. If the windows are closed the drip tapers down to 1 every 5-10 seconds. What is the problem? I can't afford to take it to the dealer to be fixed as I haven't had a job for 2 years but this is really getting irritating! My car now has a moldy smell which is unhealthy. Is there anything that I can do myself?

by in Coldwater, MI on July 02, 2010
6 answers 1 comment
ANSWER by on July 02, 2010
There's a problem with the evaporator drain, it's possibly plugged or disconnected. If you had it at the dealer for this problem and you still have the receipt for that complaint, then I would take it back to them and show them the leak and see if they'll help you out. I'm not sure where the drain is so I can't direct you to how to check it, sorry. Perhaps someone might know and they'll help answer your question. Good Luck
ANSWER by on August 29, 2010
my cobalt has the same problem and i believe there is a blockage in your air conditioning drain plug. if you turn up your a/c you shoud still see some water dripping onto the ground below the car. i am going to try and follow this drip and see if the drain plug is clogged.
ANSWER by on September 30, 2010
I have the same problem. I put a plastic butter tub on the passenger floor to catch the water. Anyone know if this has a recall on it?
ANSWER by on July 06, 2011
U frain plug is more than likely clogged if u look on the passenger side in the engine compartment about tire high yourll see a little plastic plug unclogg that and see if it helps
ANSWER by on July 06, 2011
I'm the originator of this question. My car had some front end damage last winter and I had to have a new radiator and ac condensor put in. I don't know if the drain was unclogged then but I have had my ac running several times so far this summer and I'm happy to report that I haven't had one single leak inside. Pretty costly way to fix it but at least it's fixed!
ANSWER by on October 11, 2014
My drain is clean & dreining but still leaking on pass floor what else could it be
COMMENT by on April 09, 2015
If you have snaked out your drain plug and it still leaks inside, the gasket for your ac/heater core housing is probably worn out. It is located under the dash on the passenger side behind the fan motor, near the center. I am about tho have to do the same to my wife's.
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I have a 2005 Chevrolet cobalt an I am leaking water (very clean and cold water) leaking from under the dashboard on the passenger side. Was told that it may be the heater core but it may also be a...