Question about 2004 Pontiac Montana

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AC unit causes carpet to get wet

Whenever I run my airconditioner, the carpet on the drivers side gets very wet. Is there a drain hose or something that may be clogged that I could open up.
Thanks...Bill

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Yes the A/C condensate drain is probably cloged up. I have not worked on a Montana but if you look at another GM mini van with the A/C on and the condensation driping out the bottom you can see where the drip comes from.
I hope this helps you.

Posted on Sep 25, 2009

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Posted on Jan 02, 2017

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Hi thank you in advance for your response. I have


I can only give you what happened to me. Is the passenger side front carpeting wet or has it been wet in the past? If so, remove the carpeting/insulation on the passenger side (remove passenger seat as well). Find the wiring harness that runs under the carpet and connects to the car's computer (which is under the passenger's seat). Look for corrosion at the electrical connector and replace if necessary. Also inspect the harness for wear through causing a ground. I had lots of problems with my Daewoo until I found that issue. I would up replacing the electrical connector going into the computer and presto...no more problems! I hope this helps. In addition, you need to remember that the defrosters and AC generate moisture which collects in a little drip pan underneath the heater. There is a drain hose that routinely gets clogged which causes the carpeting inside on the passengers side to get wet. Fix that drain line - replace with a larger diameter hose if possible. I blow mine out regularly using compressed air.

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Once you have got it clean, run the garden hose on the windshield and you should see water coming out of the drain. No more wet carpet.
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