2012 C 200.. air conditioner??
 

About a month ago, when I would turn a corner, the sound of woosh would come across the under carriage of the dash.. It continued to get worse. Then it sounded like running water. I had a guy bypass the heater core and Now if I have the air on, it does the same thing only the floor boards are getting wet. Still blowing cold air and the temp gauge is fine??

Suggestions?
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