wet floorboards, AC drain plugged?



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Thread: wet floorboards, AC drain plugged?

  1. #1
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    wet floorboards, AC drain plugged?

    Hello all,

    I have been lurking for a little while now and I have read a few fixes for the problem I am having already. I certainly appreciate all the help you guys can give. I have a 2005 Chrysler Town & Country Touring.

    I read that if you have wet floorboards it's usually from a clogged AC drain. I have used compressed air, rag, my finger and even a coat hanger in the drain outlet on the engine side of the firewall. It still leaks. I have replaced my cabin filter (which was pretty filthy, and probably the culprit to the problem in the first place). I tried to reach into the hole where the cabin filter goes and only felt ribs of aluminum no real dirt in there. And it still leaks.

    I read that a fix for this is to get the drain hose from Chrysler and put on the outlet stub and it will fix the problem.

    So my question is, does the drain hose fix the problem even if the drain has not been "flushed out" or unclogged? And if not, how does one go about cleaning this small stub out? Any help is greatly appreciated.

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    A/C drain not clogged? Have you checked the drains on the bottom of the wiper tray? 3/4 inch diameter, one on left and right side. Debrie in the air inlet clogs them. I should say that's where they are on a 3rd generation van. Not sure on your 4th gen van.
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    Floorboards .... wow .... that's back in the days of wooden frames for vehicles.

    Service Bulletin 24-001-06 REV A applies to 2001 - 2006 Minivans made before December 16, 2005 (MDH1216XX). Also applies to 2004 - 2006 Pacificas.

    Some info:
    SYMPTOM/CONDITION:
    The customer may describe a wet front passenger floor or floor carpet. This condition may be due to water (A/C condensate) from the HVAC assembly drain tube.
    DIAGNOSIS:
    Verify the passenger side front floor or carpet is wet. Check the source of the water leak.
    As A/C condensate leaves the HVAC drain tube, it may run back along the outside of the
    drain tube, past the seal, and under the passenger side front floor carpet. If the HVAC
    assembly drain tube is the cause of the water leak, perform the Repair Procedure.
    PARTS REQUIRED:
    Qty. Part No. Description
    1 68001994AA O-ring
    REPAIR PROCEDURE:
    1. Disconnect the battery.
    2. Disconnect the inlet air temperature sensor.
    3. Loosen the clamp and remove the inlet hose from the throttle body (leave the other
    end attached to the air cleaner housing cover).
    4. Remove the air cleaner housing cover.
    5. Inspect the HVAC drain tube. Clean out any debris or other restrictions in the drain.
    6. Install the HVAC drain O-ring onto the HVAC drain tube, making sure the O-ring is 6
    mm (0.25 in.) onto the keyway on the top of the HVAC drain and beyond the slot in the
    bottom of the HVAC drain.
    7. Install the air cleaner housing cover.
    8. Attach the inlet hose to the throttle body and tighten clamp.
    9. Reconnect the inlet air temperature sensor.
    10. Reconnect the battery.
    11. Set the clock to the correct time.
    POLICY:
    Reimbursable within the provisions of the warranty.
    Time alloted for the repair is 12 minutes.
    2007 GC SXT - Magnesium - S&G - 3.8L - 112,920 kms
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    Quote Originally Posted by RIP View Post
    A/C drain not clogged? Have you checked the drains on the bottom of the wiper tray? 3/4 inch diameter, one on left and right side. Debrie in the air inlet clogs them. I should say that's where they are on a 3rd generation van. Not sure on your 4th gen van.
    It only leaks when the AC is on. I can't find the other two drains on the wiper tray, but I did clean out that entire area and it still leaks.

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    The problem can be two fold. One, the outlet tube is clogged. You don't state your year or model, but my 90 GV had a 90 degree rubber nipple that had a pinch opening to let water out, but algae over the winter would sometime clog it. Other times, here in Florida, mud daubers, a wasp, would build a mud nest in any open hole. If you cleaned out the hole sticking out, you probably are not clogged. The other thing that can happen is that the water can follow the tube back into the cabin on the bottom side of the tube. putting a 90 on the pipe should fix it if it seals well. If you cannot get a 90, try a real fat O ring of the proper diameter to roll on the tube past the slit in the bottom where the water comes out. It should be between the firewall and the end of the slit. This will give the water a drip point and it should not follow the tube back into the firewall. If you have gotten the felt mat wet underneath the carpet, you need to peel the carpet back and dry it out. Spray with OdoBan (from Sams club) to disinfect to kill the mold and put a small fan in there to dry it out completely. If not you may have mold problems.
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    1964 Simca 1000 (bought for $10 rebored) 50k 4yrs
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    My understanding of the issue is that if you don't have the longer hose attached with the bend pointing down, that the water will actually follow the outside of the hose back into the van, eventually dripping inside, wetting the floor.
    The same symptom can be caused by the hose being clogged by some debris which you seem to have already eliminated.
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    Quote Originally Posted by Jeepman View Post
    Floorboards .... wow .... that's back in the days of wooden frames for vehicles.

    Service Bulletin 24-001-06 REV A applies to 2001 - 2006 Minivans made before December 16, 2005 (MDH1216XX). Also applies to 2004 - 2006 Pacificas.

    Some info:


    Time alloted for the repair is 12 minutes.
    I have read that TSB, and it is very similar to the one for the Drain hose. However, my question is more to if you put this O ring or the Drain hose on, will it still leak, because the drain is clogged?

    I really guess I need to try and see, lol. I just don't see how a O ring or a Drain hose will cause it not to leak inside if the problem was that it was clogged in the first place. I understand the "fix" is that the drain tube allows water to run along it and then it goes back into the cabin, and the new O ring keeps the water from "pushing" back in, but I am not sure that's my issue. I'll do the fix tonight, then report back.

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    There is a lock on each side of the cowl that you can unlock and disconnect the drain tube to see if it is clogged. You can probably put the O ring on from underneath without removing anything if you are a bit agile. I can touch mine. 05 TC
    2005 T&C Ltd 3.8 69k
    2000 Caravan 2.4l
    1990 Grand Caravan 3.3 149,000 owned 15yrs 4 trannies
    1990 Dynasty 3.0 120k 1 tranny 4yrs
    1981 Dodge Aries 2.6 only new car I ever bought 225k orig 11yrs
    1966 Dodge Coronet 440 Wagon, way old 1 yr. 135$ (Had to borrow it at the bank!)
    1964 Simca 1000 (bought for $10 rebored) 50k 4yrs
    1965 Ply Valiant V8 85k
    1964 Ply Valiant Wagon slant 6 200k 1 qt/200 miles
    1969 Corvair convertible 4 carb

  10. #9
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    I have had this problem several times and it is always clogged at the nipple. It can happen for the evaporator to get clogged by an animal storing food in it or some other reason, but it is highly more likely to be just being pulled back in the compartment by capillary action.
    2005 T&C Ltd 3.8 69k
    2000 Caravan 2.4l
    1990 Grand Caravan 3.3 149,000 owned 15yrs 4 trannies
    1990 Dynasty 3.0 120k 1 tranny 4yrs
    1981 Dodge Aries 2.6 only new car I ever bought 225k orig 11yrs
    1966 Dodge Coronet 440 Wagon, way old 1 yr. 135$ (Had to borrow it at the bank!)
    1964 Simca 1000 (bought for $10 rebored) 50k 4yrs
    1965 Ply Valiant V8 85k
    1964 Ply Valiant Wagon slant 6 200k 1 qt/200 miles
    1969 Corvair convertible 4 carb

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    Quote Originally Posted by wayner123 View Post
    Hello all,

    I have been lurking for a little while now and I have read a few fixes for the problem I am having already. I certainly appreciate all the help you guys can give. I have a 2005 Chrysler Town & Country Touring.
    Quote Originally Posted by tcwagner1 View Post
    There is a lock on each side of the cowl that you can unlock and disconnect the drain tube to see if it is clogged. You can probably put the O ring on from underneath without removing anything if you are a bit agile. I can touch mine. 05 TC

    Can you explain where and what the cowl locks are? That would help me out a great deal.

    I too live in FL and going without AC is a pain.

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