[Bob Lincoln]

Perhaps you mean the evaporator. The condenser is the unit just in front of the radiator. The evaporator is the unit inside the car behind the dash.

When you run the A/C, you should see water dripping out that drain steadily and puddling under the vehicle. If not, the drain is probably plugged.

 

[Bob Lincoln]

OK, so maybe the drain is not plugged, but the pan under the evaporator has rotted, so that some goes out the drain and some drips out of the pan into the interior.

Or, the foam seal of the heater box is so badly deteriorated that there is a huge air leak here, and cold air leaking out of the box is causing condensation behind the dash, and it drips onto the carpet.

 

[Bob Lincoln]

Maybe not remove it - you might be able to remove the glovebox and idle the truck with the A/C on, and see if there is condensation, or get your hand near the box to see if the seams are leaking air.