1996 jeep grand cherokee water leak on to pass carpet from heater box only when driving with the a/c on. parked with a/c on water drains normal out of the frame rail

your ac drain is not draining. under hood on right side under heater box is a little plastic pipe get a piece of wire put it in about one inch to release clog. be prepaired to get very wet.

Drain fluid into a clean plastic bowl, check for brass cuttings or metal shavings in sunlight. If present get complete trans overhaul.

98 grand cherokee limited 5.2L same problem found leak not from heater box but from drain mount on firewall under the glove box not behind it. drain line should be located behind right front tire in the frame. Turn your wheels hard left look inside fender well right side towards back side. hole in frame where drain line should come out.

You have a leak in your air conditioning compressor Your system works on the reheat principle All air passing through the system is cooled and reheated before it enters the cabin this sould be dehumidified air but it passes through the heater core and sence the air is not dehumidified you are getting condansation as the air flows the heater core that is heated by the engine heat and the water is from condencation because of the leak in the ac compressor The unit is a press fit in the center of it and fials unfortinatly a lot with this disgien of compressor

Is water coming out or is it antifreeze? If its antifreeze you have a heater core leaking. If its water than it's normal. The air conditioner is also a dehumidifier, and that is where the condensation comes out.

Drain is on pass side under hood on firewall, You have to access it from underneath. Use a coat hanger yo clean it out, Keep in mind when it opens your likely to get very wet... Good luck

We had the exact same problem with our grand cherokkee. The drain goes through the firewall, under the carpet, behind the glove box and comes out inside the frame on the passenger side. It's virtually impossible to get to.
There is a way to fix the problem. You can get a repair kit from your dealer. You have to pull back the carpet, which mean taking the interior side wall and the door threshold off. You then have to drill a hole in the vent housing, then using a small parts grabber reach in and pull out the debris that has built up, next you let the system drain (a small flexable bucket help for catching the water that comes in), then install the supplied plug. If my memory serves me right the kit came with fairly good instructions.

the water sound i believe is from being low in antifreeze..if you are adding water oncce a week then there is a leak.. try looking on the inside of the car on the passenger side carpet to see if its wet..if not, then check things under the hood such as, heater hoses for heater core, water pump, thermostat housing, radiator, core plugs, block heater..if the smell is coming from the inside and there is a film on the window, then chances are you need a heater core....try that.

It can be the heater core leaking or it could be the A/C condensation line is clogged up.More than likely it's the heater core if it is a large puddle of water though.

The a/c drain tube will be located on the firewall. It will be on the passenger side twards the bottom of the firewall. It will be about 3/8 inch in diameter, and about 1-2 inches long sticking out of the firewall. You will probably need to get under the vehicle to gain acess.

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