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You unclogged the sunroof drain line - that is good. Are you sure that the line didn't pull up thru the floorboard. Many vehicles run the drain line down the drives side window pillar and out thru the floorboard. If the hose shrinks with age (as some do), they can pull up into the cabin and leak on the floor.
the heater will not have a drain hose but the evaporator for the ac unit will have . Pull the floor mat back under the ac box and you will see where the drain hose goes into the floor pan
The water/condensation drain line is only about 3 inches long and connects directly to the pan under the AC coil. It comes out of the Firewall and makes a 90 degree turn to the ground. The end is crimped down a little and if you ahve water coming back into the car passenger side floor board it is probably that line that is clogged. You can clear this using a small thin (needs to be stiff like lacing wire) to clear the blockage.
Look under the hood where the ac lines go into the firewall,and look directly below it,it may have a elbow boot like thing on it,just pull it off and use compressed air to blow the drain out,it will come out like a water fall when it is unstopped,if this was helpful,please rate,thank you.
your a/c evaporator drain is stopped up or blocked off can be seen at firewall area on passenger side looks like a short black hose coming out of firewall and turns down with nothing hooked to it if this gets restricted the blackbox under your dash fills with water and eventually leaks in floor you can try and run small piece of wire up hose to unstop but be careful not to punchure evaporator core
on your firewall of your van neer where the a/c lines go through the firewall there should be a plastic tube there i would try something soft like a soft drink straw so you dont damage the condensor if you have room put a shop vac up to it
The system is freezing up,the reason,the evaporator box is filling up with condensation,the drain needs to be unclogged,there is a drain under the car right below where the ac lines go into the firewall into the car.It is hard to find,and you will need an air tank to blow air into the drain and unstop it,water will pour out like mad when it is unclogged.Keeping the cabin filter will help keep this from happening again.If this was helpful,please rate,and thank you.
The 05/04 Pacifica did not come with an elbow tube on the drain line for the AC drip pan. As you drive, the air flow into the tube pushes the condensate water back into the pan which is inside above the passenger floor board, the drain line is under the hood on the firewall. I spoke with the parts guy at the local Chrysler dealer, he sold me a drain tube for the 06 (~$10) and I installed it, wasn't too hard to do from the top if the engine is cold. The elbow slips on over the drain tube. Make sure to point the tube down. It only took one trip to start seeing water drip out of the tube and the floorboard started to dry up and almost three years later, the floorboard is still dry.
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