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On the passger side the floor is wet when you have the air condition is on

(1999 Pontiac Montana)
in Newton, WV on February 12, 2012
and the heater is on to
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Popular Answer
on February 12, 2012
The heater core is most likely busted and you usually smell antifreeze.
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on July 26, 2014
Also make sure your evaporator drian is not clogged. When you turn the A/C on check under the passenger side you should see a black tube sticking out. Make sure water drips out of it with the A/C running. If it does not check the drian tube on the passenger side under the dash. You will see it going from the evaporator box to the floor. Also check it for holes or a tear.
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