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Most likely the A/C condensation drain hose has a leak/crack or become dislodged from its outlet. It should drain through the floor of the vehicle. Check above the spot your car would normally leave a puddle outside when the a/c is running, it's possible the hose is not draining properly....

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โˆ™ 2011-09-13 15:36:47
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Q: Why is the floor on the passenger side rear seat behind the front seat getting wet ac heater from where?
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