Question about 1998 Jeep Grand Cherokee
Could be a clogged water drain line (blow it out w air), the heater core may be leaking (any coolant} windshield seal. when its dried up, use a hose to spray water on the car to see if u can create the condition for a diagnosis.
Posted on Oct 28, 2017
it sounds like your heater core is busted. you will have to go under the dash to get to it and replace with a new one
Posted on Oct 11, 2008
The heater/airconditioner box under the dash has a drain hose to allow condensation to drain when the air conditioner is running. If this hose gets plugged, rain may accumulate in this box also (if it's raining heavily), as it comes in through the fresh air intake.
Look on the engine side of the firewall, probably on the passenger side, for a hose coming through the firewall that is not connected to anything. It is usually short, has a 90 degree bend, and the open end is down. Make sure that the end of this hose is not plugged.
Posted on May 11, 2009
Unless this happens in the rain as well, I would not worry about it. Likely in the car wash, far more water is coming in than the normal drain system can handle, therefore causing it to overflow. If you do have a drain obstruction, find the drain hose (small right angle hose on firewall passenger side) and roll it in your fingers to clear it.
Posted on Oct 12, 2009
Just had ours fixed, look on engine side of firewall, if the outlet pipe in passenger well is a 3/4 inch long pipe projecting forward into engine bay with no tubing leading down towards the ground, the problem is water comes out trickles back with pressure in engine bay to foam seal under the pipe and enters footwell inside car.
Take a piece of rubber tubing and hose clamp it on and direct it down towards ground in engine bay and the problem will be solved!
We have gone from soaking carpet to no leak at all with this simple fix.
Posted on Oct 15, 2009
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