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Re: Condensation on the inside of the windshield
Heater core has developed a leak.
Usually not something the average Joe can do.
I can not Judge your mechanical aptitude.
I would recommend a mechanic. Some parts of the dash (or the entire dash) must be removed.
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Most likely it is the condensation from the air condition building up. There is a small tube under the car that the condensation is supposed to drain through, but it is easy for the tube to get clogged by debris causing the condensation to overflow onto the floor inside. The best way to clear it out is to go under the car and locate the tube, it will be on the passenger side underneath. Use compressed air to blow the debris out of the tube.
Have you been adding a little more antifreeze recently if so check the floor on the pass. side,if it is wet your heater core is leaking.That will also cause the excess moisture on the inside mostly on the winshield.
there's a few different things that could be causing your floor to be wet, one is your heater/air conditioner unit has a drain tube on it to drain off condensation out of the box (inside the car) that contains the heater core and air conditioning evaporator, it is designed to drain to the outside of the car near the engine area, they often become plugged up with debris which don't allow them to drain though the hose and then begin dripping inside the car on the passenger side, the other possible case is that the windshield has been replaced and not sealed properly and water is entering around the windshield and dripping on the floor.also there is a minor possibility that water is entering around the door seal, although unless there has been damage to the door or door seal is very unlikely. thanks for using fixya
Either your heater core is leaking, is the fluid sweet smelling and slimy? Or the condensation drain from your air conditioner is plugged causing the condensation to drain inside as opposed to outside. Or the glass seal is bad and rain water is coming inside from around the windshield. Heater core is going to need a repair guy, condensation drain can usually be fixed in about 5 minutes at any shop with a lift, glass leak you are going to need an auto glass shop's help.
Check the condensation drain and make sure it is clear and allowing the condensation to drain outside the vehicle. This is normally located on the passenger side Engine compartment firewall area at the bottom. It most often looks like a copper tube that has been bent over at 90 degree angle toward the ground.
is it only when the ac is on? there is a pan under the ac unit that has a hole in it to allow the condensation to empty. if that hole gets plugged it could cause the condensation to build up and back into the inside of that car. i unplugged mine and floor stayed dry
The drain from the a/c under the dash is plugged up and needs to be cleared. If you check from under the vehicle, u should be able to find the end of the drain tube on the passenger side, behind or near the front wheel. Carefully run a wire up the tube to dislodge the obstruction (goop build up). You can also use compressed air.
Well, first of all, whats the cause of the problem?
Lets go out warm up your car, get it nice in hot in there. Turn off the heat and feel around the edges of the windshield for a draft, if so, the seal around the windshield is gone.
I had this problem with my Neon, and the windshield was my first thought. The simply answer was that my floors were wet, when I turned on my heat, the water on the floors evaporated and then condensed on the windshield. Is this possible for your situation?