Originally Posted by SmithsonGA
Indy thinks it is probably a plugged drain.
Anyone know where this tube is? Sounds like the fan is blowing the water and it is trickling back down....and putting the fan on high blew it out the vents.
Could be - The condensate drain permits moisture extracted by the AC to dump under the car. You would ordinarily see that puddle under the car after parking and after driving for a while with the AC on? It is possible the drain is plugged with debris or insects. If it doesn't drain it has to go somewhere - possibly being picked up by the AC air flow to the vents.
Look for the vent tube - I think it's somewhere near the right front wheel well.