Water leaking inside my car?

JEFRE9461

MEMBER
2005 NISSAN ALTIMA
6 CYL
2WD
AUTOMATIC
79,000 MILES

I discovered a puddle of water in the right, rear floorboard of the car. I had parked the car on a steep hill and the water had drained from the front right floorboard. After diagnosing where the water may have come from, I discovered the water only occurred when the A/C was running. I could feel cold water in the floorboard of the front passenger seat. It is apparently A/C condensate draining from beneath the dash. Do I have a clogged or broken drain tube? If so, how do I find and repair?

10 Replies

LEGITIMATE007

MECHANIC
5,121 POSTS

Yes that probably is the problem. the tray that collects all of the condensation from the heater core and evaporator core has a drain tube. if it is clogged then it will back up and pour onto the floor from behind the lower dash. but , listen now, if you park your car on an incline when there is condensation accumulation in that tray then is gonna pour backwards and again onto the floor this video will help you fix it.

https://youtu.be/q9_MZiS2_NE

now the drain tube is in the engine compartment on the fire wall usually on the passenger side of the compartment. it can be soft rubber or a hard tube, but it should be bent downward at a 90 degree angle. stick a pen or something in there to make sure its not clogged.

let me know what happens

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Wednesday, April 30th, 2008 AT 5:10 AM

82NDYANK

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I have what looks like the same problem. I bought the car a few days ago and removed the carpets and found all the water. I am going to replace the carpet but before I do, I'd like to know how to fix the problem. If it is the A/C what do I need to do?

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Monday, June 16th, 2008 AT 11:57 AM

KHLOW2008

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41,814 POSTS

Hi 82ndYank,

You need to check for a clogged or dislodged evaporator drain tube. this video will help

https://youtu.be/q9_MZiS2_NE

let us know.

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Monday, June 16th, 2008 AT 12:45 PM

LEGITIMATE007

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5,121 POSTS

What up khlow2008? Yes that is the first thing your gonna want to check is the evap tube, it may be clogged with debris, simply put a pen or something skinny that wont break and work it back and forth, but it could also be a heater core or a drain problem too. So hopefully its just the evap drain. Are you positive its water and not coolant?

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Monday, June 16th, 2008 AT 1:45 PM

GKRAMPE

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3 POSTS

Funny. I had the same issue today.
So. Where do I find this drain tube specifically? I'm handy with most things, but not with technical car/engine terms.

Do I take the glove box out? Or go under the car (passenger side)? Or go in from the top-side of the engine (passenger side)? I know I'm looking for a "pinky finger-sized tube". Where is it coming from or going to? Sorry, I need a map. Thanks a bunch for your help.

Sincerley,
wet floor mat in Minnesota