Passenger Wet Floor?

[ATFrancis]

2001, 31 foot Jayco Eagle class C. Ford 350 Chassis

After we drive long distances, we notice that the rug on the passenger side is sopping wet. Picture attached. A mechanic (not sure it is a good one) says they can't figure out what the problem is. My father in law (who I purchased it from) said he thinks it is the AC and the drain hole plugged, but I am not sure that it is dripping from the AC. Also, I am not sure it only happens when the AC is on. I know, a bit light on details, sorry.

Is there a chance it is seeping out of the center "hump" where you can access the engine?

[rgolding]

Yes, it could be coming from the seal of the rear hood to the engine. Do I think it is? Not likely. I agree, a good source is the ac drain. It won't be happening if the ac isn't on. I also think it could be the heater core. These things don't last forever.

I'd pull the carpet on that side, so you don't create a rust problem and create more damage. Put a rubber mat down and use the vehicle and start investigating and documenting when it is happening. Oh, and keep the water/ antifreeze sopped up.

Or give it to a reliable dealership and let them spend your money doing the investigation.

[Witt74]

I would agree that the drain hole for the A/C is plugged. That will definitely cause a wet carpet. If the heater core was leaking, you would have a strong odor of antifreeze in the cabin. To my knowledge, there is nothing else in that area that can cause you problem.

[Tunce the traveler]

I would put my money on a plugged drain hole.

[Sundancer330]

If you know the location of the drain tube you can blow air from a compressor into it and maybe dislodge something. I have used this method on skylight drains that got plugged with dirt and overflowed into the car.

[che57vy]

Mr mud dauber loves those AC drain tubes