Car a c systems are actually designed to allow water to drain out of your vehicle.
Water underneath car carpet.
You should also check to see if your vehicle has drain plugs in the floor that you can open up to release any trapped water.
This may be your problem.
Especially if your vehicle is not garaged and oft.
Is the carpet in your vehicle wet after a rainstorm or driving through a carwash.
Use a tool such as a screwdriver to create leverage under the sill to prop it up.
The system cools the cabin by pulling humidity from the air and that moisture needs a place to go.
Normally condensation in your ac system exits through a small drain tube in the bottom of the vehicle but over time that drain tube can get clogged and cause water to backflow into your car interior.
No matter how much you towel or vacuum off your car s surfaces any fabric and carpeting in your car as well as the chassis beneath will be damp to the touch.
When car carpet gets wet the water seeps down underneath it to the foam backing which can grow mildew on it if it stays wet.
It s often accompied by slight fogging of the windshield and possibly the sweet smell of antifreeze.
If you have antifreeze in your system the water on the floor will aslo feel somewhat slimy.
Use airflow to clear out moisture.
The most common problem when you have water on the pass side carpet is a leaking heater core.