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Re: water accumulates on the floor in the passenger rear
Your heater core has sprung a leak. Coolant from the engine runs through this device, and the leak allows the coolant to leak into the passenger compartment. If you check your coolant level in the engine compartment and find it down, you will have to replace the heater core. It is definitely not an easy job, as it requires dismantling much of the components in and under the dashboard, including the airbag, and discharging the air conditioning system.
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If it happens when you run the A/C It could be that your A/C drain is clogged and draining to the inside of the car. If it happens while running the heat your heater core could be leaking, but that's usually on the passenger's side and you could smell the antifreeze inside the car, unless you have water in the radiator instead. Other than that inspect your door and windshield seals.
Go to the passenger side or driver side there you need to find the A/C drain tube make sure that it is draining outside and not in the compartment area.This drain hose tends to pop out, so when you have the A.C on you notice there is water draining out but in your case its going in thhe car.
Hi , Its leaking water on the passenger rear floor? It could be the heater core leaking and running down the floor board to the rear of the vehical. Do you smell antifreez or see moisture build up on the windshield ? does the car seem more "humid" inside?
I have a 1993 ParK Avenue, the original owner said that when she purrchased the vehicle new in 1993, she has always had water getting into the trunk, I found water in the passenger rear floor and I assume it is through the trunk, I had water in the trunk, I drilled holes in the trunk , also in the floor of the passenger area, Yesterday I vaccuum the car and the passenger area was dry, I think a little water may enter the trunk but it will drain before it reaches the interior.
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.
Hi, we also have a 2002 Toyota Rav4 and developed a leak in the front driver's side of the car. After much research, we discovered that the drain wells from our sun/moon roof were clogged. If you have one of these, I suggest that you open the sun roof and look carefully. You will notice some tiny little holes in front and in the rear of the sun/moon roof tracks. Over time, these become clogged with dust and debris. You need to find a long, sturdy piece of thin wire and run it down the holes. To test if you have properly unclogged these, take a small amount of water and pour it down the holes. You should see water coming out of the drain wells under the car around the rear of the front tires. Hope this helps.