Leaking under dash - Toyota Nation Forum : Toyota Car and Truck Forums
1st Generation (1995.52004) 1st generation Tacoma information and discussion.

 
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#1 Old 09-27-2007, 03:46 AM
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Leaking under dash

Whean I use the A/C something leaks from under the dash. Its a pretty noticable amount too. I havnt had time to check what it is. Anyone have any idea what might cause this? Just picked up the truck a week ago and now this....
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#2 Old 09-27-2007, 08:04 AM
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I saw this before on my buddy's honda civic, everytime he'd use the air, the passenger's floor would get soaked. Mechanic told him that there is a drainage hose for the condenstaion that was clogged causing the water to end up on his floor.

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#3 Old 09-27-2007, 01:03 PM
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i've seen this also and it was a damaged hose. so you just gotta check the hoses.

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#4 Old 09-27-2007, 01:50 PM
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Where do you find all these hoses? I look under the dash and don't really see anything...
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#5 Old 09-27-2007, 03:20 PM
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If you look behind your glove box you will see a black box, this is the evaporator assembly. If you look under the hood coming into that box through the firewall you will see you A/C pipes these pipes go into the evaporator (giving you cold air) below those pipes on the outside is a small hose that take water from the evaporator assembly to the outside. I find that if I crawl under the passenger side of the car right behind the front tire, and look up you will see this small black hose. You can use compressed air to some weed eater cord to push up into the hose. This will usually fix your problem. Good luck.
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#6 Old 09-27-2007, 03:21 PM
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Happened to me too once but not on a Toyota. The condensate drain was plugged. Easiest way is to find where it empties out under the truck and then snake it with a piece of wire or something. Don't use anything sharp or you might end up piercing the hose. Then it will leak whether it is plugged or not. I don't know exactly where it is because I haven't had the problem with the Tacoma but it is a V6 and the condensate seems to drain on the right side of the engine somewhere.
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#7 Old 09-27-2007, 11:52 PM
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yeah try to snake the drain hose on the passenger side. it happens from time to time. kinda a pain in the ass.
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#8 Old 09-28-2007, 08:24 AM
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as stated above its probably an issue with the drain
you can see the drain tube by looking at the bottom of the evap box on the passenger side make sure it isn't pinched either

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#9 Old 10-09-2007, 05:41 PM
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I just had this happen yesterday - drove through a serious downpour and the high humidity caused a lot of condensation to form. When I made a left turn I heard the HVAC blower fan making noises like it was getting hit with water; making right turns caused water to run onto the passenger footwell.

Turned out that my drain line wasn't clogged, but the was not pointed in the right direction. On my '04, there is a metal tube sticking out from the rubber grommet in the firewall and this metal tube had been turned so that it face slight upwards, instead of pointing down to the ground. This allowed the water level in the evaporator case to rise higher than normal, causing my problems.

So, first check to see if the tube is pointing straight down or nearly straight down before trying to clear the line.

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