Question about 1996 Pontiac Grand Am

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Water comes out through AC drain

Thank you very much for your help!
The thing is that water comes from the AC drain without having the AC running!
I do not have water inside of the car but when I start the car water comes out through AC drain without running the AC.

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Its filled up the bottom of the box and its just enough to blow out when running

Posted on Oct 07, 2008

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There is a drain under the vehicle under where the ac lines go into the vehicle cab',look directly below the ac lines,it is hard to find but it is there ,use compressed air ,like a air compressor or air tank,with a blow gun and blow the drain out,if it unclogs the drain,it will pour out like a water fall,if this was at all helpful,please rate thank you.

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Water leaking in to car from clogged drain tube


the a/c drain tube is ONLY to drain a/c condensate coming of the evaporator in your a/c system. Has nothing to do with rain, but everything to do with high humidity. If you put you a/c in "ecirc" mode when using the a/c, you cut down on condensate draining by about 70%.
WItht he a/c running ona humid day, you should see condensate draining out of the drain tube on the passenger side under the car body.

The rain water is another story. You have an air intake we call a "Rainhat" that is under the leaf screen at the base of the windshield towards the passenger side. If you have rain water dripping or running into the rainhat, it will run into your heater plenum (the big, black plastic thing under the instrument panel).

Remove the leaf screen and look for leaves or other debris clogging the area around the rainhat. look to see if water is running along the metal trim above the rainhat and dripping into the rainaht opening.

I once fabricated a cover over the rainhat using the bottom of a plastic anitfreeze bottle. I made an opening at the rear so it could still draw air in without restriction. It solved the water running along the base of the leaf screen and drooping right inot the rainhat. It rusted the blower motor and ruined it.

Good luck.

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1 Answer

Water comes out through AC drain


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Oct 07, 2008 | 1996 Pontiac Grand Am

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