Wet floor board - Dodge Cummins Diesel Forum
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post #1 of 31 (permalink) Old 09-03-2019, 11:20 AM Thread Starter
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Wet floor board

2017 2500

Wife discovered over the weekend that my passenger floor board was soaked and mildewed. I did some research and stumbled across the ac drain sometimes bleeds back into the cabin. After I verified the drain line was cleared I found a 90* elbow that fits over it and routed it down towards the ground in hopes of this solving my issue. Today when I get to work after a 45 min commute I notice the floor board is soaked again. Is there something internal I can take apart and re seal or is it possibly something else??

Any input will help.

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post #2 of 31 (permalink) Old 09-03-2019, 11:30 AM
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center brake lights is a major cause and has been for years. Marine weatherstripping seems to be what people use with the most success. Should be a ton of threads to look up.

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post #3 of 31 (permalink) Old 09-03-2019, 11:38 AM
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Wet floor board

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Originally Posted by THETANK01 View Post
2017 2500

Wife discovered over the weekend that my passenger floor board was soaked and mildewed. I did some research and stumbled across the ac drain sometimes bleeds back into the cabin. After I verified the drain line was cleared I found a 90* elbow that fits over it and routed it down towards the ground in hopes of this solving my issue. Today when I get to work after a 45 min commute I notice the floor board is soaked again. Is there something internal I can take apart and re seal or is it possibly something else??

Any input will help.


Is this the front or rear passenger floor board? If itís the rear, Iíve heard of the rear glass leaking as well as the third brake light as mentioned above.


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post #4 of 31 (permalink) Old 09-03-2019, 11:56 AM Thread Starter
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Itís the front floor. If the rear light was leaking that wouldnít only happen with rain..I cleaned and dried the floor Saturday drove around Sunday and it was wet again. No rain in between. Also, would it leak marks on my headliner if it was leaking?
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post #5 of 31 (permalink) Old 09-03-2019, 11:57 AM
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Quote:
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Itís the front floor. If the rear light was leaking that wouldnít only happen with rain..I cleaned and dried the floor Saturday drove around Sunday and it was wet again. No rain in between. Also, would it leak marks on my headliner if it was leaking?


Did you have the A/C on? And does it smell sweet?


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post #6 of 31 (permalink) Old 09-03-2019, 12:04 PM Thread Starter
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AC is/was on, yes. No it does not smell sweet or have any oily consistency. It doesnít appear to be the heater core/anti freeze.
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post #7 of 31 (permalink) Old 09-03-2019, 12:04 PM
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Sunroof in this truck?

Possible drain leak.

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post #8 of 31 (permalink) Old 09-03-2019, 12:05 PM Thread Starter
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I was almost curious if it was the duct running to the AC seats sweating. But itís only on the passenger side and that hardly ever runs.
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post #9 of 31 (permalink) Old 09-03-2019, 12:06 PM Thread Starter
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No sun roof
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post #10 of 31 (permalink) Old 09-03-2019, 12:09 PM
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Originally Posted by THETANK01 View Post
I was almost curious if it was the duct running to the AC seats sweating. But itís only on the passenger side and that hardly ever runs.
Cooled seats aren't cooled by the a/c, they only are ventilated with a fan.

Is this happening during rainy weather or after washes?

Possibly a leaking windshield seal.

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post #11 of 31 (permalink) Old 09-03-2019, 12:18 PM Thread Starter
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I stand corrected, rear ac floor vent duct. I havenít known about the wetness long enough to determine what situations drive the wet floors. Is there access to the ac/heated box from inside under the dash? Wondering if I can pull it apart and watch as the ac runs...
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post #12 of 31 (permalink) Old 09-03-2019, 12:22 PM
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Could be the AC drain tube is clogged and the condensation from the AC is spilling onto the floor. That is about the only possible cause with no smell and no rain.
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