water is leaking from passenger dash when AC is on whats the problem or has any

You will have to be able to gain acess under car . I cannot exsplain exactly where it is. It varys from make and modle and repair info does not show it it a manual. I find it with my flash light and my basic knowledge of how differant manufactures hide things. Clue it usally is located below fire wall always below HVAC case.