I had that prob with mine. The drain in the engine compartment was blocked. Good luck trying to find it yourself, even my mechanic had a heck of a time getting to it as it's on the firewall.
Cleaned it out, blew it out and all was well......For several weeks then started all over again.
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Often the floor of the passenger side become wet if the drain pipe of the evaporator is:
- Bent or twisted.
- Clogged or,
- There is any obstruction in its routing.
The drain pipe is a rubber hose about 14 mm in diameter, located just under the evaporator (cooling coil) casing on the passenger side.
The most easiest way to clean the pipe is to take it out, wash it from inside with water or to blow a compressed air slowly through its distal end while leaving it in place under the body.
Note: Keep your eyes away while blowing the air.
Hope that it works.
If this happens when the air cond is running, its usually a sign of a stopped up drain tube for the ac. The tube is normally on the outside of the firewall where it meets the passenger side of the floor.
Your AC overflow is clogged up, it needs to be cleaned out. It is a little rubber hose sticking through the fire wall on the passenger side up front, bugs and dirt get in there and clog it up, then the ac will flood the floor. The seat can be unbolted from the floor and lifted out, these bolts are fine thread and high torque, meaning it takes a while to get them out, if you have an air ratchet , use it. The chair is probably wired down, so don't forget that when you have an arm full of chair and can't move. Hope this helps.
look under the car there are plugs located in the floor look to see if the plug has rotted , the ac condenser still condenses water even if it is not turned on check to see if the drain on the fire wall(located on the fire wall passenger side towards the bottom)is plugged with mud or debris, if it is not plugged the heater/ac unit shell may be cracked allowing water to seep, also check around the front window for leaks.
The ac box is filling up with condensation.The drain ,is under the firewall,under the ac lines going inside the vehicle.Take a small diameter wire,and run it in the drain,back,and forth,until it clears,it will run out like a water fall,so look out.If this doesn`t work,then use compressed air to blow in the drain.