Question about 2004 Chevrolet Cavalier

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When the air conditoner is on the passenger side floor boar fills up with water

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Check the lower Firewall under the car for a drain tube that may have been clogged or bent too much by some obstruction. The water you are seeing is from teh condensation on the AC coils in the blower housing. It should drain off through the drain but if that is clogged or obstructed it drains into the passenger side floor board.

Posted on Jul 20, 2010

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There is a black rubber hose just on the firewall, passenger side, and could be either a few inches up or underneath. Either way, locate and run a coat hanger carefully up to tube and pull out any debris that may be plugging the hole. It may require you to pull out the fan motor and clean it. Let me know what you find and I can help accordingly.

Posted on Jul 20, 2010

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You have a clogged drain for the heater/AC box
go under car safely, and find rubber hose and clear all debris

Posted on Jul 20, 2010

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1 Answer

2006 tirbeca when heater is on only blows hot air on drivers side, But when AC is on blowws cool air on passengers side. also water dripping on passenger side when AC is on


Problem with driver's side blend air door. Water on the floor is a sign of a clogged condensate drain tube. Do a search for how to clean a car condensate tube.

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Sounds like the outside drain is stopped up.
There should be a tube coming out of the firewall near the passenger floor.

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The usual problem when this happens is that the drain line from the AC condenser is plugged causing it to fill up with water which eventually finds a way out and drains onto the passenger side floor. It is fairly easy to fix but requires getting underneath the car on the front passenger side, locating the drain line, normally a flexible hose coming down through the frame roughly below the dashboard. and running something like a coat hanger up through the drain line to remove the blockage. Beware that water will start to run out the hose as the blockage is removed.
Some cars have this problem more frequently than others and you may have to repeat this procedure every year or so. When it starts dripping water on the passenger side again it's overdue.

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There is water the fills the floor of the passenger side of the car when the air conditioner is running


The AC condensation drain is clogged, when the AC is on water is condensed on the cold AC evaporator core (this part is what cools the incomming air), this water drains out the bottom of the heater/AC air duct, the drain is at the bottom of the firewall under the hood on the passenger side, run a coat hangar up into the drain to clear it.

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have the AC evaporator (found under the dash) inspected. It may need cleaning or the drains may have fallen out of place.

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My 2004 Dodge Stratus SXT has water under the front passenger seat and pools up in the rear passanger floor. I thought it was rain filling up in my rear passanger door because that has happened before, but...


You most likely have a plugged a/c evaporator drain tube. This tube drains away the water that condenses on the evaporator core [the one under the dash next to the heater core] whenever the a/c is running. If the tube is plugged then the water will fill up the bottom of the plastic heater/air conditioner housing until it overflows and leaks onto the floor. This drain is located on the engine side of the firewall, passenger side, down very low at the bottom curve of the firewall and is usually a very short rubber hose about 2" long. It can be hard to spot as there is often a lot of stuff in the way that makes it hard to see. A quick check is to park the car on a level spot and operate the a/c for sevreral minutes. You should soon see water dripping onto the ground from under the car on the passenger side of the vehicle. If you see it dripping then the hose is ok and you have a different issue, if not then you can pretty much bet that the hose is plugged. I usually use a puff of air to blow out whatever has plugged the hose [bugs, debris, etc] which fixes it until the next time it plugs.

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Water on floor behind front passenger seat


drill a hole through the floor as a quick fix ,if it gets in let it out ,then check for the leak ,try under the firewall where the AC drain pipe is ,it could be the same pipe for drain water coming in from air intake vents

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1 Answer

Wet floor on passenger side in front and the extended part


The ac box is filling up with condensation.The drain ,is under the firewall,under the ac lines going inside the vehicle.Take a small diameter wire,and run it in the drain,back,and forth,until it clears,it will run out like a water fall,so look out.If this doesn`t work,then use compressed air to blow in the drain.

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1 Answer

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This means your air conditioner drain tube is clogged. This will take about a hour shop rate to repair or if you look behind the glovebox you will see it. Thanks

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