Water enters near heater core at Car Wash!
I have a 2005 Jeep Grand Cherokee with a 5.7L Hemi. Whenever I go to a particular car wash that sprays water from the sides, hitting the under carriage, water seems to enter my Jeep and hit the heater core. It sounds like water is hitting it and boiling off. Sometimes the fan/AC controls act strange for a little while after going through the car wash. I also notice a small squeal in my AC/Heater fan which I think has been caused by water entering previously.
This only happens if water is sprayed up from the bottom. Where could the water be getting in? I would REALLY like to prevent this from happening in the future.
Re: Water enters near heater core at Car Wash!
Are you sure the water is coming in from the underside?
I haven't heard of that one before, and can't think of where the water would be getting access...
What is a little more common is in the winter for the drain tubes of the sun roof to become clogged with ice, and then when the car wash sprays the TOP of the vehicle and water enters through the sunroof, with the drain tubes clogged it leaks down the A-Pillar and eventually ends up behind the dash. Not saying that's what your problem is though...
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