1999 Kia Sephia Water coming out under glove box - passenge

Hello, we purchased a used 1999 Kia Sephia from a older gentleman. When we have the ac turned on water pours out on the passenger side and soaks the floor. So much comes out that it actually will soak a towel. He was the 2nd owner and drove it very little in the 9 yrs he owned. I have looked at the Kia Service Manuals which provided no help or direction in which to look. I want to try to get the problem repaired due to possible mold issues. Thank you.